is it actually a net win for society, or just a personal win for power users like those found on hn? Simply allowing all third party apps probably leads to lots of extra malware being installed on iPhones.
A first-party only ecosystem is authoritarian and non-competitive. Apple's ecosystem in particular on iOS and iPad OS is akin to your government controlling everything that you can do.
There are several parallels that can be drawn between societal and technological infrastructure.
Also, Apple strips developer's signature replacing it with AppStore signature. So I, the user, cannot independently verify that I'm running the same thing that developer deployed.