Yeah what can be done is create a clean Google account registered through an anonymous phone number and a throwaway user name & password, and best to secure it with a hardware key just to make sure no one can get into your OTPs by somehow getting access to those credentials. That should allow you to save credentials in an account at least if you make sure to not login to it on the same device as your other accounts.

But also not blaming anyone for not trusting Google in the first place.