I appreciate everyones concern and, to be honest, it sounds bad, but seriously... calm down! It's not going to be the end of the world, even if they do it.
Allow me to elaborate:
The huge majority of people, don't do self-custody anyways, they either buy and keep in CEXs or they buy ETFs. So, this leaves a minority (the rest of us) who seriously care about bitcoin's true intention and do self-custody. But, we 're not like the rest of the world, we will find our workaround.
Yes, NotATether is right, that some people will not know where to download APKs and GPG keys. But are they really this many? Because, unfortunately, I think it's just a few people.
Disclaimer: I don't use mobile apps as wallet software, only PC, but I can feel your frustration.