It's the gift you get for the person who has everything and I guess they don't care whether it's real or not. Talking about naming things, I have always wanted to name a zoo animal. Weird?I guess a better example is random people selling "deeds" to an acre on the moon or for naming rights to stars. Or even letting you buy a lordship online. NFTs are in the same realm as these. They're created from something with no real value. So that people can say they own something (that they don't really own) and maybe hope to sell it for more in the future.
I don't get why people would "buy a star name" from some random company that has no official right to name a star.... But people do it all the time. A bit like these NFTs.