If anyone's interested, there's a brand of phones that's actively trying to change this: https://www.fairphone.com/en/

Contrary to other brands, they can actually try to fix it because they can also admit that this is an issue with their first two phones: because they're an awareness campaign as well, because they're documenting what issues they encounter and why it's so difficult, and because they want to be the trailblazer that figures out how to improve this situation, so other brands can copy their model.