Because crypto is a joke and NFTs are vaporware. The concept is honestly laughable. Perfect example for NFTs, my company wanted to advertise that our service could help with the production of NFTs and my boss had put together the ad for it. I advised against it considering the BS and controversy associated with it. It became doubly apparent when I looked at the ad and saw that he had included several of the (in)famous NFTs that had been sold. I point blankly asked him if he had gotten permission to use them. He said no. Then I pointed out that the fact he was able to put them in the ad without asking and paying for the right to to the person who had spent millions on the NFT was exactly my point. NFTs are a scam. Thankfully he saw the light and dropped the whole nonsense.

As for the blockchain in general, it is unsustainable. It requires enormous amounts of power and computing cycles to maintain which gives it a massive eco-footprint and sucks resources needed by actual industries and individuals to support. If you started attributing it to all digital purchases, including resales, it would expand exponentially. It is fine in concept, and if it could function in a passive state somehow it might see usefulness as a purchase and resale history for digital media, but it can't. It requires many computers maintaining identical records in active communication with each other.