That never works on Facebook though, because as soon as a ”friend” reports that ”I’m not me” then the account will be permanently banned. That also triggers for photos that’s not genuinely me, like a pet or drawing as portrait.

Never? Facebook is pretty overrun with what are basically fake profiles. Hell, I've been curating an alter ego on Facebook for over a decade. Built up a profile with several dozen "friends" that are all kind of interconnected and regional, but of course none of them have ever met "me" IRL, and the profile picture is a funny-ish celeb pic. Facebook has millions of legit users that are "friend collector" types, and won't think twice about engaging with an account that gently strokes their online ego with likes, "Happy Birthdays", etc.

There is an easy solution: don't log into facebook. Anyone you want to talk to on there has a phone.

... and nothing of value would be lost.