You are correct. NFTs do not prevent counterfeiting. One could argue that it makes counterfeiting easier due to their open nature.

However, it also makes detecting counterfeits trivial. So trivial that the consumer can detect it using their own devices and freely available wallet software. No need for special skills or trust anchors like appraisers (other than the public blockchain and public standards).

This isn’t a complete solution for scams because most people don’t realize how trivial it is to check before they buy. I believe the remaining problems are in usability and education problem. The tech does lower the barrier to achieving a safer ecosystem.

We could have a healthy debate over whether the tech solved the hard side or the easy side of the problem.