It’s a great way to separate gullible people from their money and that is always in demand.
NFTs are not cryptocurrencies, but I assume the parent comment was also calling them a scam? (well, they didn't use the word scam, but it looks implied)
There are also other "solutions" on top of blockchains, but I keep reading about them only from people who have a vested interest in getting more people to take part, in order to increase their own net worth. Which sounds like a pyramid scheme to me.
But to kinda contradict myself: Yes, there are blockchain things that are not pyramid schemes or other scams. But they also don't provide any other value. Whether they are scams or not depends on if you think the people pushing it actually believe in what they're saying.
NFTs are storing links to pictures
Coins are storing the state of the ledger.
Exatly same technology
NFTs are… well they added the concept of nonfungibility. It's interesting, albeit currently without useful applications.
But take "blockchain land registry". The blockchain will be a pointer to a physical house, or piece of land. In that way it's pretty much exactly NFTs, but I would not say they are exactly cryptocurrency.
So if cryptocurrency, NFT, and land registry are A B and C, then I would say that B and C "are the same", but A and C "are not", but A&B as you say sure are very similar.
Note that I'm not saying blockchain land registry makes any sense what so ever. Because it doesn't. A block chain will never decide who owns land, because courts and government does, backed by the power of the police.