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.