All an NFT is is a token that represents ownership, like if the title to your car or house deed was on a blockchain.
NFTs have some sane use causes like designating the owner of a valuable asset or creating electronic tickets that can be resold or transferred without some centralized entity like ticketmaster.
Prior to NFTs existing, would you purchase the ownership rights to a gif or tweet? Probably not. And that is what is dumb about the excitement around NFTs, some people with more money than sense seem to think that now that you can represent ownership on a blockchain some things, like crappy jpegs, have suddenly become valuable assets.