In concept what you say is correct but reality is complex. There are very few providers that implement friction free login/password and importantly security. A large number of email providers didn't implement 2FA until very recently. Even those that have terrible apps, ad infested, no app password or oAuth etc. so many governments use MS hosted services.

It is akin to Visa/MasterCard duopoly. It is hard to escape but even if one does it then it resulted only inconvenience. I still don't have my cards in phone - neither will google change path nor will govts force a change.

I don't see any contradiction here with what I said. If you feel that using Google for email is unavoidable, that can be the part that you keep using. You can still easily ditch a lot of other things. E.g. Pixel phone, Google Docs, Google Drive, AWS. Each of those has plenty of, arguably better, alternatives.