Love the spirit of what you say and I practice it myself, literally.
But also, no - Just self-host or it's all your fault is never ever a sufficient answer to the problem.
It's exactly the same as when Exxon says "what are you doing to lower your own carbon footprint?" It's shifting the burden unfairly; companies like OpenAI put themselves out there and thus must ALWAYS be held to task.
I actually agree with your disagreement, and my answer is more scoped to a technical audience that has the know how base to deal with it.
I wish it was different and I agree that there’s a massive accountability hole with… who could it be?
Pragmatically it is what it is, self host and hope for bigger picture change.
Anything else is literally impossible, though.
If you send your neighbour nudes then they have your nudes. You can put in as many contracts as you want, maybe they never digitised it but their friend is over for a drink and walks out of the door with the shoebox of film. Do not pass GO, do not collect.
Conceivably we can try to control things like e.g. is your cellphone microphone on at all times, but once someone else, particularly an arbitrary entity (e.g. not a trusted family member or something) has the data, it is silly to treat it as anything other than gone.
Then your problem is with the US legal system, not this individual ruling.
You lose your rights to privacy in your papers without a warrant once you hand data off to a third party. Nothing in this ruling is new.