NFTs don't sell ownership rights. NFTs are equivalent of buying photographs of a celebrity. You may own NFT that represents Taylor Swift, but she aint going on a dinner date with you.
Not to mention you are not the only one to hold it either as someone else can Taylor Swift NFT and sell it to.
It is exactly same as buying and owning cards of your favourite celebrity. They are worthless even compared to cowdung and have absolutely not practical value.
One has to be high on drugs to buy ugly gifs for thousands of dollars.