One small but important correction. NFTs are not a scam, it’s an amazing technology that has the potential to revolutionize lots of stuff, that became popular when people used it for stupid shit.
Saying NFT is a scam because people have used it to scam others is like saying phones are a scam because people call others over the phone to scam them.
NFTs are essentially a decentralized token. This means that they can be used to represent anything you might want to represent with a token, e.g. ownership of a physical object such as a car or a house; ownership of a digital asset, such as a website or game; some predetermined amount of something, similar to a stock or bonds; etc. The fact that some people used it to mean ownership of random pictures and people thought buying random pictures on the internet for a ridiculous amount of money was a good idea tells you more about people than about the technology.