I personally only use "sign in with google" for websites where I don't care about making a new account if necessary. I don't pretend that a person can normally browse the internet without privacy leaks. It's not about caring, it's about knowing what's worth protecting and what isn't. I am okay with Google knowing I shop at Adidas.
I am just giving you another perspective and why I believe it's not necessary to completely avoid. I respect your decision for the sake of privacy.
Sure, for the few sites I care deeply about a long history with, a unique account might be worth it. Those sites are few and far between.
My password manager has more than 500 entries. A huge majority are sites I used once and never again. I don't want an account there but was probably required to create one to check out. If Google deleted them they'd be doing me a favor. Google knows I went to those sites anyway since I probably found them through search results.
I dont care.
The only services important for me are: bank, email and hosting. Losing my gh would suck but it is not serious
The rest of services I treat as "nice to have"
My accounts on them are irrelevant for me. Losing account on random forum, random game, some streaming platform wouldnt change my life. I would just create a new one.
It would suck, but thats not important
HN is littered with people who’ve experienced Google bans. An article hits the front page about it seemingly monthly (and those are only the ones that get publicized). It happens again and again. You have no recourse. There is no one to call. There is never an explanation.
I’m not here to convince you. To each his own. If you dont care about the privacy leaks, then surely you can overlook the risk of losing access to your non-Google accounts whenever Google decides.