I never really got into "phone" progrmaming, always waiting for the shenanigans to die down. But somehow the shanigans have gotten worse and for a significant chunk of the world population, the phone is the only computation device they have at all.
I never got into it because I was convinced developers would refuse to give up control over distribution when Apple started doing it. I wish I was right, but here we are.
Developers are businesses and the economics need to work. For that, safety and security is much more important than openness.