Won't there need to be centralized authorities to check if something has been stolen?

This is the same problem with pub/priv keys for email. How do I prove I am who I say I am?

The best defense is just to use a hardware wallet to not get in the situation in the first place. After that all you can do is post to your various social media accounts that you've been hacked and here's your new wallet.

Assuming NFTs become more mainstream and integrated with banks for land deeds and the BMV for car titles, something more official would likely be put in place (this is the best case long term scenario for NFTs).

> Assuming NFTs become more mainstream and integrated with banks for land deeds and the BMV for car titles, something more official would likely be put in place

Ummmm.... elephant in the room! NFT is the trust mechanism

You're saying: "NFTs will be good once we do all this other stuff in the real world that we are already doing". Thus negating the entire reason for NFT to exist.