I know more about the blockchain than you do. There is no such thing as custody. There is no such thing as self custody. There is a thing called knowledge. You either know your seed words or you do not. Period. That is all. You do not possess a thing, you know a thing. More than one person can know the thing. More than one person can be required to know more than one thing (multi-sig.) You can't even know all the things your seed words might have access to (you can't query all permutations of all derivation paths across all chains at infinite depth in the derivation constantly...) It's like the halting problem, you can't even know when to stop searching. Nor forks of the chains your keys may have utility on already.
I've told you all this 10 times or more, but I bet near none of you are even smart enough to get it? Why don't y'all lawyers and lawmakers read? I'm trying to educate you... Learn man. It's really easy to understand. Why am I the only one explaining this? Am I the only to understand it?
You know some words. You don't possess a darn thing. Any more than you possess an idea.