Basically, you are saying NFT creators can create any type of digital artwork in any type of media that they want, and NFT collectors can collect them for any number of reasons. Maybe some of that is stored on chain, maybe some is not.
So then, what is a Non-Fungible Token (NFT) actually good for? The answer seems to be proofs of provenance, ownership, and authenticity.
Provenance is defined as the place where something originally came or began, or a record tracing the ownership history of certain items that helps to confirm their authenticity and value. How many things in the world need a proof of provenance? Paper towels? No. Corn? No. Cars? Yes, maybe. Art? Yes, as established, but not everyone likes art like they do their cars, at least in the West. So, market sizes matter. A good idea is only as good as the market, and NFTs aren't an idea that is actually sold, it's an idea on an idea of selling something. Like marketing, NFTs are more like a meme than a product or service. (I realize some people consider marketing to include market analysis, which is something else entirely.)
But, who runs the car provenance proofs? Do we put all the data about the car on the chain? That would be too much data for current chains. I suspect, like the speed of computers, an increase in throughput will just result in more junk on the chain. How much junk can a chain take? Not much, I'd hazard. How do you sell your car NFT to grandpa when the car chain is full of junk? You probably don't.
But, there isn't really much in which I need to prove ownership. My house and my truck have titles. It's pointless to make NFTs for them, given the state runs the database and the state is pretty good at this by now, especially given they take money from me for property tax and plates. I don't care to prove ownership of anything else. What I have in my possession is enough proof. The police would take a photo of my 3d printer as proof of ownership if it were stolen and then located in my neighbor's house.
The whole idea about using NFTs to share(holder) out my house or truck is also pointless. To make me pay someone that held an NFT on a share of my house is going to be a challenge. There's probably a contract somewhere that would do more good in forcing my hand to pay up, like the mortgage company would do if I had a mortgage and defaulted. But, is it useful? I guarantee attorneys will get involved if that happens.
Authenticity? Who cares? In this age of mass consumption, the focus of NFTs on art defines a very small market. In fact, I'd say the desire by some to "collect", of a certain generation maybe, is pretty pointless. It reminds me of my friend buying a bunch of Hot Wheels in his 20s because he thought not opening them and playing with them would make them worth more in the future. He had a huge collection in his attic. I don't trade things like this, but many do, and I appreciate that they may think NFTs help with their "hobby".
At the end of the day NFTs are made for the imagination - which is why the conversation always turns to gaming. They cater to it like nothing else. They make people think that "value" is a real thing and that it can somehow be "preserved" by using a series of calculations. I get that some people love the idea of NFTs so much, they can't help but spread that love to others. The only problem I see with that is that there really is no killer use case here. Instead, we get things like NFTs of blocks of tungsten that can only be touched once a year or saving that "special moment" in game that will be forgotten by the mind in a year.