The amount of time you've spent on this game has nothing to do with the legitimacy of an NFT.
You're suggesting we incorporate the concept of buying a token that says you own a piece of art when no ownership rights have actually been transferred, into a browser based basketball manager. Even if we gloss over what this unfettered usage of cryptocurrency is doing to the environment, it's still a terrible idea that does nothing for the game. Who would even play it other than HODL hippies who probably have a bitcoin body pillow in their bedroom?