Without a legal link into physical objects, NFT are mostly useless IMO. Which doesn't mean they can't be traded, as anyone who's been following shitcoins understands.
Yes, many things can be created. The question is whether the trade creates or destroys value. For NFTs, I'd suggest the latter. Though I suppose some might get short-term entertainment value from these things, many believe they are the "next big thing". Just look at how many believe that $68M for an NFT is real and not bullshit.