The people who named them don’t seem to realize they are not “non-fungible” since you can start another chain. And of course the NFT of a real thing is not the real thing, it’s a URL to a picture of the thing, so they don’t necessarily have the same owner.
If you used private key encryption on both sides you could securely transfer data between two parties, and prove that you did so in a way that is very hard to dispute. But like Snowden says, it is still unencrypted going in and coming out at the endpoints. It is very hard to watch my creative friends wish that digital data behaved like real world items.
I think you can explain it pretty easily at least. A blockchain is a Google Docs spreadsheet. An NFT is an entry with the name of an item next to the name of an owner. Magic prevents other people from editing it, but you can just start another spreadsheet and put your name in there.
Plus if it's the NFT of a physical item then you can just steal the real thing.