It's not, at all. I've heard that phrasing or similar (that it's a pyramid scheme, that cryptocurrencies are wasteful) from people who don't even know how to find HN.

In the photography world in particular, mentioning your NFT is likely to get you laughed out of any forum in which you bring it up.

IMO if you encounter any non-technical artist "excited" about NFTs, tell them to stay the hell away, or risk being seen a bad friend. I tell people I will not help them, that I am very happily uninterested, and urge them not to do it at all.

It would be irresponsible not to.