What would stop an actor with enough resources (Russia, China, USA) to put deepfakes onto the chain?
What would stop them from blackmailing service providers who act as gatekeepers / market platforms to put deepfakes into the chain?
Why would they even accept any single "Blockchain X" as the source of truth? Why wouldn't they just say "Oh that's the evil state Y, of course they're pretending that their fakes on their state-governed propaganda blockchain are authentical, whereas OUR blockchain tells the TRUTH!"
How would you correct honest mistakes on the chain? By a correction update? Then what would stop an evil actor (Taliban) who overturns the government, or takes over a giant corporation, from "correcting" an unpleasant truth, and rewriting history?
Once again, a social problem is attempted to be solved with technology. This never works.
> I think NFTs will settle down eventually and they'll be useful
What would be different, given some time, from now? What needs to change for NFTs to become useful?