I do think about the ability to repair computers when I think about filesystems and how they're managed. If you take away the ability to see the filesystem, how do you fix it? All your data and settings would have to be somewhere else if someone had to rebuild the device. Some data (financial or deeply personal) I would want local or on a removable device.
An example: Windows 7 is easier to repair than Windows 8.1 is, and Windows 10 is harder. Why? Microsoft has taken away many features techs used to repair machines (F8, Safe Mode access from a shut down machine, Startup Repair that usually worked, etc) so that I'm cautious about hiding and simplyfing more things. I do wish there was a Tech Mode that would give you 1) an optional boot progress screen like Linux has so you could see where the boot stopped, 2) a dashboard that tells you the status of the system, 3) Startup Repair methods that work, or better yet a more robust boot process. Security improvements have made it very hard to repair a Windows 10 box that has failed to boot due to bad drivers or updates. Grab their data and rebuild from scratch, then reinstall their software seems now to be the only method that works to repair Windows ... and it's a shame and it's not elegant.
Which is why I'm on a Mac. I'll fix PC's all day long, but when I get home, I want the OS to get out of my way and let me do what I want the way I want to. I don't want it to talk back.
I do like how the Mac hides the operating system from the normal user. It's very restful. But, a technician can unhide everything if necessary. You can't do that on iOS. The MacOS seems to be more durable and more efficient than Windows, and from what I can see anecdotally, it breaks less often. My first modern Mac was a MacBook 2.1 and it was using 2007 hardware. Put Vista on the same hardware and the fans would spin full blast nonstop; the MacBook never used its fans. Most impressive and the reason I switched to my current MBP (17" mid-2009).
BTW: I like your signature. People need privacy.
Regarding fixing computers - mostly applications ..
Developer Teams can make their applications more robust. Microsoft specifically has begun over the last few years with a "Fix It For Me" were a small downloadable applet not requiring admin credentials can resolve a few issues right down to the registry.
The only reason when troubleshooting an Application that I use the file system is to inject/remove specific files or delete a folder entirely. When an OS from the core is responsible for the actual core file system - many over the last 40yrs already are to be frank; then there would be no need to touch it.
- uninstalling an application should FULLY remove ALL files, folders, and other hooks within the system. Unfortunately this has been a horrible practice of NOT doing this for decades. Things need to change for a better performing system. Heck even OSX has left overs in /Library from removed applications.
Registry, or using Terminal is an alternative way of working to clean out a file system. By Default Local Admin or domain admin group membership by a user should specifically require elevated privileges before messing this low level.
Regarding end user data.
All your data remains in pretty much the same system that you're using.
Changing your way to access it doesn't change the fact that it's there, or you having the full modify/special permissions to do with it as you please. It really shouldn't else we'd have a MUCH DIFFERENT type of conversation but let's just keep that particular conversation to personal privacy and data that is submitted by our smartphones into social media and then fully owned by said services once its there. Ability to download "records" is not the same as you've uploaded - take a GOOD look, you'll see.
On your iPhone, iPad do you really worry about WHERE your photos or Videos are? Do you worry about where your Alarms, Notes, Calendar Meetings, ToDo List is, other PIM data, or your other data is? No you don't. You access ALL relative data into the applications that are primed to access, use, modify or delete said data. Simple and Easy.
Windows ... really? "what you talking about Willis?!"
F8, Safe Mode access from a shut down machine, Startup Repair - ALL work the VERY SAME as Windows 7, XP and ME. You can still access msconfig, DOS, PowerShell (administrative tools / windows feature enabled), computer management, etc just the same as before. If you don't know this ... this conversation should be done right now lol.
F8 = Safe Mode, Safe Mode with Networking, Verbose Mode, etc. is all there in Windows 10 Enterprise, Professional. Only imbedded systems don't have these options and I highly doubt that too. I can access these on a Intel Compute Stick let along a Lenovo T440/450/460/470/480/X1 Carbon 5th/6th generation machines and many other PC brands.
1> F8, Safe Mode Verbose Mode.
Option: boot from USB or PXE and access DOS (already elevated) and launch Event Viewer.
"'Security improvements have made it very hard to repair a Windows 10 box that has failed to boot due to bad drivers or updates"
- Safe Mode and Safe Mode with Networking.
Uninstall and remove the drivers and package
Double check no other hardware is connected during boot.
Disable any applications or services that are not primary - msconfig minimal boot (vs Safe Mode booting).
- sounds like you don't have a LOT of experience troubleshooting windows. Besides there is a LOT of troubleshooting on the OSX (I'm still having a hard time calling it macOS because Mac OS debuted before OSX).
but when I get home, I want the OS to get out of my way and let me do what I want the way I want to. I don't want it to talk back.
Brother ... you and I are HERE ... eyes in the same direction.
This is precisely why I believe that the file system will soon go away. We use Applications, Services, the Internet. Devices have gotten a LOT simpler.
Did anyone complain when Unix, Linux and finally OSX took over disk fragmentation? Nope. The hard drive, SSD's, still work the same way just much more efficiently over the long term so, as the famous Bertrand Serlet once said .. "No user should ever have to worry about disk defragmentation"

Nor should they worry about the file system.
Our brains don't systematically categorize all data we consume.
We can watch a murder point blank. Yet the police investigators KNOW that with every minute passes facts ... starting with the most important yet smallest in our minds are the first to get misconstrued, forgotten and soon changed. Remember that old saying and game Broken Telephone? Have you played that at camp as a young kid? If you're younger than 35 most likely you haven't and thus the phrase maybe lost on you along with the importance of it related to memory and factual data.
PS: Signature is a line from that Netflix movie "Anon" ... it struck an accord with me when I heard it. Definitely we need our privacy.
Looking forward to growing and learning more ... maybe YOU can teach me macOS>
My first Mac was a 2002 Quicksilver PowerMac G4 733Mhz machine. I knew more then about using a Mac than I do today as the majority of my time and learning is for my profession - working in a Windows world. I look forward to transitioning to full MacOS support and database and architectural design soon enough.