But Apple still control the platform, like they do with macOS......Sorted? Really....?
No.
The "bad actors", hell let's just name them. Facebook. Those guys will remove their apps from the App Store and make their apps available on some other "freedom app store" which will have ZERO privacy protection and a very long legal Ts&Cs which the user has to agree to allowing all sorts abuses of privacy and personal data.
Yeah you could just not install their apps which is what I intend to do but it'll happen.
Apple looks after the masses who aren't tech savvy and switched on about these things (my mother and her sister come immediately to mind). They are the ones that naively do what ever the screen tells them to do.
It's the tech savvy minority who want sideloading. What for, I really don't know, but they feel it is a right they must have and to hell with everyone else.