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.
The legal validity of things come from people using it and courts enforcing it, someone years ago might have said:
The thing is that even if a technology is used mostly for stupid things that tells you more about humans than about the technology itself. Or do you also think that phone calls are scams because 90% of the phone calls you receive nowadays are scams, even though the technology behind phone calls is the same used for mobile internet.
Also the destroy the environment claim is really bogus, for starter money pollutes more than crypto when you consider all of the chain of what it takes to produce and transport money. But also for example if you live in the US your home probably pollutes more than a mining farm since they're usually in places where electricity is extremely cheap, mostly in China near a hydroelectric power plant. But also the technology itself doesn't need to consume that amount of energy, that's just the current implementation, but there's a push to move to PoS instead of PoW, which would mean that NFTs (and crypto in general) would not need farms or even a specially powerful computer.