I think the network effect has to be massive before that really starts to happen. And there needs to be some system for revocation/cycling of keys in the database in the necessary cases of death, lost keys, hacks, confiscation, etc.
But this is one of those things where so many crypto bros were certain “blockchain” was the answer here and completely failed to recognize that like 90% of the blockchain node/consensus system is pure bloat and totally useless in the context of real estate. Literally all you need are keys and a public database. Literally all the other stuff is superfluous.
Still feels like you need an administrator, or set of administrators, either way. There’s no way to make real estate ownership “trustless,” but it can certainly be made WAY less expensive.