Yes, and I think that's not because they don't want to do it but because:
1) they don't know that they should do this; 2) they don't know why should they do this; 2) they don't know how to do this; 3) because even the systems marketed as current state-of-art (Passkeys) are poorly designed and don't even allow to have proper 3-2-1 backups conveniently (can't enroll a device sitting in a safe, it must be physically brought online which beats the whole point of offsite backups).
Design it to make backups and failover secure yet easy, available out-of-box, and explicitly recommending best practices to follow - and everyone will do it as a no-brainer, at least for anything they care about.
Until recently no one told people to not reuse passwords. Even today most password-based signup forms just ask for password and maybe tell the requirements (length, characters) but extremely rarely they explain anything about uniqueness, randomness or anything else. No surprise it sucks hard in practice, when nearly everyone ignores the education aspect.
People aren't stupid. At least in general. They're just blissfully unaware about a lot of things, especially the older generations. What is impossible in real world is designing a fantasy football nanny authentication system to "safeguard" them, without making a lot of undesirable sacrifices. We manage to explain people to not poke with scissors into electrical outlets (and make it hard to do so accidentally) - we can manage similar stuff with computers too.