I think this is true, manmade diamonds are valuable in a way that counterfeit currency is not. But "most people" may not be as important as people who know the story of, and the person wearing, the gem, and provenance is always a meaningful point of reference for expensive luxury items.
My screenshots of NFTs are pixel accurate, but not exactly as valuable as the real thing.
My screenshots of NFTs are pixel accurate, but not exactly as valuable as the real thing.