The points you've mentioned are indeed the actual fact about NFTs, or should I say, they were supposed to be the future potentials of NFTs in th eco system at large, but the honest truth is, NFTs have lost its place.
Nfts were most popular when the Ethereum network began to grow bigger. It was more of a store of value quite similar to buying a meme and it's price or market value depends on the level and intensity of hype it's able to attain. The problem was gradually as meme launching became easier and more prominent, NFTs gradually faded off.
Intellectual copyright: For artists, musicians and creators of all kind, NFTs could serve as an onchain record of intellectual property making it more easier to prove ownership and collect royalties...
Yeah but the catch is if the NFT isn't hyped it will likely have no value and the next value depends on the ask and bid prices. NFTs are still out there but they are not hype much like they were back in the day.
I have read about NFTs before, what I saw about them is that they are digital things like digital arts. If people use their simple brain, the arts that sold most are common people in the past that are well known to this world while other arts are not selling at high prices like that, that is how digital arts will be and that is how they are now today. Most arts will have low price but some will sell at high price, while there are few ones that will sell at highest prices but they will belong to people like well known politicians and well known people.