So is spinning up a docker container with this all already configured... I just don't see the argument I guess, it's just too easy to do yourself. Instead you're getting ripped off and losing privacy. There's no reason to believe fastmail is any more private than GMail, staff can just as easily read and deliver your mail to whomever they please.
A medical degree takes years to get, this takes 10 minutes for a basic setup, an hour or two for a more advanced one, assuming you're in the industry already and know your way around.