I've been back and forth a few times now, so am one of the few people who does understand. But yeah most people do the whole "football team" mentality and are like "yah boo yours suxxor"
For me the main plus to Android is/was freedom. Being able to sideload apps, tweak how it works, allow apps to have control over system functions, automate more things with IFTTT, send files via bluetooth etc. However iOS has implemented more and more of what I wanted over the years (compared to when I used to consider jailbreaking a must!) while Android has become more and more restricted (things like SafetyNet fighting back against people rooting) so I think the gap has narrowed.
I always end up going back to iOS for... basically, consistency. Battery life being a prime example - on most iPhones it's less than stellar BUT it's predictable so at least I know when to be at an outlet / carry a battery pack (probably because of the really tight control over backgrounding - if you hammer your battery it's because you're playing games or using the GPS etc in the foreground, not because a couple of your favourite news and social media apps have decided to run away with themselves). My experience with Android is usually that I have better potential battery life but that it varies considerably. Sometimes I might get 2 days, other times I might get 5 hours, without the usage being wildly different. You find yourself going through battery stats all the time trying to find out which app has rolled out a screwy update
this time. I'd rather know that with usage pattern x I will get a day rather than playing the "maybe you'll get 2! But maybe you'll get 5 hours" lottery.
Also consistency of camera. Again they might arguably not make the best in the world, compared to say Pixel 2, depending who you ask. But it's always excellent, never bad or "meh". I loved my OnePlus 3T camera... BUT.... the firmware seemed to pick too low ISO indoors so I'd often have to take 3-4 of the same shot to get a good one. OP can make that kind of error without much of a fuss, being a niche company. With Apple, in the event they did slip up the tech blogs would all be clamouring to dramatise it, you'd never hear the last of it for months (to the point that there'd be nothing left of the dead horse to beat, if dramas like the battery wear thing are anything to go by) and Apple would sort it. Anyway, it's rare that I take an indoor photo with the iPhone that doesn't look good.
Consistency of interface... consistency of support from networks (no "you can't have Wifi Calling unless you have this very specific set of phones with our special firmware")... lots of things like that.
The Android argument is usually like "you just need to stop being lazy and put the time in to configure your camera properly or use third party camera apps, regularly check up on battery usage and remove/restrict apps, make sure you're not running too much" etc. And it's fair, that's the trade-off you make for flexibility and freedom.
I think of it like automatic vs. manual gearboxes in a way. At the moment I'd rather just let it change gears itself and concentrate on other things
