Much easier said than done.

Many people have had their gmails for literally decades. Hundreds of accounts are tied to that address. Let alone purchases for people who tried out digital media.

A much more reasonable stance is to work on migrating away. Preferably to an email and a domain you control.

For example: I've spent probably the last year, year and a half, or so doing exactly that. I still have my gmail and that is still the default I use for online shopping and the like. But I also have my own domain and my own email(s) at that which I point at Proton (probably Fastmail in a few weeks). With the main idea being that if proton/fastmail/whatever shits the bed? Migration is literally just sending 10 bucks to a new service and updating some records in cloudflare.

But that takes a lot of time and effort. And if you aren't able to back up your own emails locally, you are up a creek regardless.

Proton or Tuta