[chipotle_coyote]

I admit that back when Apple created "Gatekeeper" for OS X, er, macOS, I had high hopes this was laying groundwork that would come to iOS later -- that we'd be able to flip a switch in Settings which allowed us to install signed apps from non-Apple storefronts. Yes, this would potentially reduce Apple's profits (and it's hard not to suspect you're correct in guessing that's why it hasn't happened), but it's hard not to think that most developers would still make their apps available in Apple's storefront the way most Android apps are available on the Google Play store. I still feel like this would solve more problems than it creates not just for users and developers, but for Apple, too.