> Losing my gmail account would have way more effect on my "real life" than if I had suddenly no letter box

Yes, due to your own lack of contingency planning.

I respect your intentions, but government regulation is not always the answer. At some point, we have to admit that we are far too reliant on these services (that many luddites refuse to use, and live a normal life).

My second sentence is true as of now, but maybe things could change in the future. However, I only base my arguments on present circumstances.

I do agree that some of these companies need to at least offer some sort of human support team or call center available to serve users that were falsely banned or randomly booted. However, forcing the hand of these companies is not only unfair, but pretty entitled.

Gmail is a free service.

you absolutely shouldnt rely on a single email provider. Instead own a domain and use that domain to forward to whatever email provider is most convenient.