it's a password.

you can't brute force a 16 character password I can't brute force it.

maybe a gvmt can do it fast enough, but if you're at that point you're more fucked than just 'oh fuck someone stole my seed phrase' level of fuck.

and if hardware become increasingly close to be able to do it you just make a new wallet.

plus the goal of the passphrase is to give you a layer of security, if someone stoles your seed phrase you should know that someone stole it, thus you gain time to change to a new wallet before they can do anything.

if you can't know that someone stole your seed phrase then your setup is just stupid.