You don't even have the frameworks that are available to protect domains. (Domain lock, transfer, etc.) And registrars are regulated by laws and frameworks in ways ATProto hosts aren't. Don't get me wrong, if a registrar transfers your domain due to a social engineering attack on the registrar, then you might lose it (an attacker almost did this to me once via a SIM swap, and I had to call GoDaddy to prevent the transfers). But that's not the same as, say, hacking the web hosting server.
In any case, tptacek, Safebox is supposed to solve these actual problems, by making sure no one can actually get into the box (no ssh, etc) so it's a "neutral ground" that no one can really "own", "redirect", steal keys or impersonate you. If you read https://safebots.ai/about you'll see what I'm talking about. If you do, I'd love to read any feedback you might have, given your background in security!
And regarding DNSSEC... if your domain is taken by the registrar (court order, ToS violation, etc.) or a government that can command the parent TLD to act, they can just revoke your old key and transfer the domain to someone else (or setup a placeholder under their own DNS) and now your protection and all concept of ownership is completely gone without your consent. This happened a few years ago with Epik seizing the soyjakparty and kiwifarms domains, including their hosting from a subsidiary company Terrahost... and KF has never even lost a lawsuit, but there are some specific people that really don't like them, and have gotten adept at claiming ToS violations via every possible company that touches them in order to try to make them go away.
Uh, no.
I can legally shoot and kill intruders due to castle doctrine and stand your ground laws in my physical home. And legal invasions require being in front of a judge and a search warrant.
A domain can be seized for 'terms of service' (aka kangaroo court) reasons. Stand your ground nor castle doctrine doesn't apply to your digital house.
How many houses were actually seized, repossessed, commandeered with "eminent domain", slowly taken over via "adverse possession", encroached on with easements and air rights, and whatever else? Versus how many domains?
There is no violence on the internet. You can't shoot intruders. And that's a great thing.
Put in legal terms, you do NOT have this level of ownership to your house... and you certainly do not have sovereign immunity on your land: https://en.wikipedia.org/wiki/Allodial_title
Usually the best you can get is this: https://en.wikipedia.org/wiki/Fee_simple
You probably have something more like this: https://en.wikipedia.org/wiki/Freehold_(law)
What you are describing is more like the king of England being able to shoot people on his own property, and have full sovereign immunity (in theory, I mean recently a British prince was arrested on allegations of far less).
That means if you are a home invader, I can legally shoot and kill you. There'll be an investigation, but both statutes are affirmative defenses to killing.
Its not that I want to, or look forward to it. I don't, and I hope I never have to. But I will, if I'm forced.
For example shooting a 5 year old kid who trespassed on your property isnt covered