I understand what you mean and if you were to ask me I think the main attraction of NFTs is not really as pieces of art or as a proof of ownership, but as vehicles for some people to launder money.
As with NFTs, those people can just create a bunch of NFTs and buy them with their own money, this creates the illusion that a transaction has taken place and they can declare those profits to the tax authorities of their country and make that money legal, when in fact no transaction took place as they just sold those NFTs to themselves.
This is a very interesting opinion about the use of NFT in money laundering. But what about the fact that own NFTs should be evaluated by an independent party, because when checking the transaction by an interested party, they may ask the question - why exactly such an amount was paid for them?
The world of art is full of those kind of movements, personally I would not have paid anything for any of the NFTs ever sold, and I am sure I am not alone in my way of thinking, but despite of this we saw some NFTs selling for millions of dollars, and I am pretty sure that most art collectors would agree that they were not worth that amount.
But things are worth whatever someone wants to pay for them, so even if a bunch of experts declared that the value of all NFTs was zero, if there is a market for them they will keep selling, giving those that want to launder money this way the perfect excuse to do it.