Poppycock, it’s just communism with extra steps. Google’s email server is not your email server just because you’ve come to depend on it. If you want your own server, build your own server.
Granted, most people here on HN would be able to deploy their own, but you can't ask that of the average citizen who just needs email.
https://www.google.com/search?q=email+provider+service hundreds of options from the same page.
Don't put all your eggs in one basket, "everybody" knows that. It doesn't just apply to computers - non-techies are familiar with the concept too. It's common sense.