NFTs actually are an easy concept, a dollar bill is a Frugal Token, because all dollar bills are the same, you can change one for another and it all works out because both represent the same thing (one dollar). A deed to a house is not frugal, you can’t just change one deed for a different one because they represent different things. NFTs are just that, Non Frugal Tokens, why some people wanted to own a digital token representing ownership of a publicly available digital image is what can’t be explained.