But I do agree with you on your point; once you lose your Google account, you lose a lot more - including your personal TS network, which may include offsite devices, grandparents' PC, etc.
Unfortunately your TS account is also heavily tied to the chosen ID provider, I don't think you can change it at all (even if you go thru support). I would prefer to be able to link two IDs to a single TS account (e.g. Google and Apple), perhaps be able unlink the one I don't want anymore. I see a security concern in there (you either have a weak link, or you can't unlink an account you don't control anymore), but it would still be nice.
I thought you could, but there's one exception (that I can't recall). If you signed up with that specific OIDC provider, you can't switch but you can with the other stock OIDC providers.
Say again please? How did you get locked out of so much I ask? I use one gmail account for mostly unimportant emailing and as a dumping ground for email signups that later spam you to death with "promotions". That's about it, and I'm able to use a hell of a lot more than "half the internet".
I'm honestly curious about the mechanics of how and why one could let aving, or losing, a google account affect them so much.