Well yes, but that's partially on you − I might understand your average person not being wary about these issues, but we're on Hacker News here, these issues have been discussed for decades.

The sites also shouldn't be 'lost', don't they have a way to register another kind of login from the same one ? And you can always make a new, platform-free account − better do that sooner than later !

Please name and shame the websites (like Advent of Code and Rebble) that only allow a login through platforms. And services that only allow Google Authenticator.