Earlier quoted context omitted.
A) this has not happened on Android, where 3rd party stores and side loading have always been possible B) if people truly value the Apple lock down system, they will not use applications that don't comply with the lock down system
Just fwiw, my understanding is that this has already happened on both Android and iOS (via TestFlight): https://techcrunch.com/2019/01/29/facebook-project-atlas/
Also worth noting that they got called out and ultimately shut down for being shady. Even though they were operating outside of Apples locked down environment. It's almost like we don't need Apple to protect us, and in fact we can protect ourselves