I understand the justified criticism of the many dishonest and politically questionable things associated with cryptocurrencies and NFTs. But I don’t remember seeing such a complete dismissal of any tech in this industry before, and I can’t help but feel that’s unjustified

Sure, there are few use cases, there are many scams, and of course there’s the very questionable energy consumption of the PoW chains. But there are lots of smart folks trying to build legit use cases, using something else than PoW, trying to honestly innovate.

That's the point: There is a lot of people trying to find the problem to their solution. Doesn't go well in most cases.