I want to be clear, that I disagree with his “federation is stupid” point, but email has problems right now.
Theoretically it’s federated, theoretically you can spin up your own mail server and self host.
But even if you do that absolutely perfectly (SPF, DKIM, DMARC etc), you can falsely end up on spam list, that effectively block delivery of your email to large segments of the network for days if not weeks.
Whilst theoretically federated, email falls under the broad dominion of google, microsoft and a couple of other large players.
I mean yes, but that’s not a federation problem.
To completely strawman AND slippery slope what you’re saying:
Agreed, dangerous, I don’t want numpties doing it.
But it’s a large part of why I have a car.