Methods for identifying and certifying ownership over digital objects are cool and imperative in adapting to an increasingly digital world. You can't complain about AI's being trained on data it doesn't own if you have no way to certify ownership of data.
People turned a great idea into animated images of monkeys because they wanted to make a quick buck. And now they are all people think NFT's can be. And, unfortunately, seemingly all they will be for the foreseeable future.
I strongly agree with your first sentence, but I don't see how blockchain is any kind of an answer to that need. I mean I'd take an NFT indicating ownership of an asset as better evidence of attempted theft than evidence of legitimate ownership, and that total lack of confidence is the fundamental issue.
We need institutional solutions for digital intellectual property, digital licensing rights, and the like. From those norms, the technology to implement them would follow. The fantasy that some technology will self-govern, and will do all of the work that institutions do is ridiculous, and tiresome. You just can't separate NFT's from the hare-brained libertarian blockchain nonsense from which they spring.
I do understand the feeling that motivates it, though. Google, Facebook, Amazon, Apple, etc. control so much of the implementation of digital property rights/licensing that it would be awesome if there were some fantastical way to fight back. Unfortunately...