As an Android user myself, so far I'm up to...zero?
Android users had/have(?) to side-load Fortnite. Depending on who you are that might feel like being "forced." Is your argument "If you feel like you are forced to use some app you are wrong and should just stop" or is it "If an app gets big enough that a lot of people feel forced to side-load it, then it earned the right not to abide by any platform holder policies."
I have yet to see one, client, customer, friend, acquaintance, relative (or rando who happened to know I'm an IT guy) sideload an app without knowing what they were doing & having a good reason to do so.
The list of those who sideloaded is small. However, my list of technically hapless folks is much, much larger - and zero of them seem to have sideloaded anything ever. There's a fair chance I'd wind up knowing if they did.
Even my often homeless ex who's down with plugging any connector into any port at any time of day (shapes need not match) doesn't seem to have sideloaded. Certainly her devices are always in a Sideloading=Off state when I check (she is not now a developer!).
From an IT view, unintended sideloading looks like a low priority concern.
The last time I checked, Apple did and Google did not.
If you have something a little weirder, the app store often will not let you install an app which doesn't state compatibility. Sideloading the APK more often than not works fine.
Also, there's alternative sources like F-Droid which have stuff you can't get in the Google app store - ad-free Youtube apps - that will never be allowed on the Google app store.
