Don't count out gambling. NFTs are a gambling game, where you win if you aren't the last one holding the bag. There's no hard guarantee that the traffic for a given NFT is real or not, but if its origin is something scarce and noteworthy (like being minted by the subject of a popular meme) then that can be a Schelling point for gamblers to converge on and reasonably conclude that other gamblers will be trying for the same NFT.
At some point the game ends when sources of new players are exhausted and everyone stops playing, but at one point I believe people were playing. Of course at the time people tried to describe why someone might buy a NFT as being some vague other buzzword laden reason, probably because the game ends sooner if everyone knows everyone else is also just hoping to flip it for a profit.
I don't think this is true, but a lot of this impression is probably because much of the growth in actual use of cryptocurrency for everyday finance is happening outside of places like the US or Europe:
There is also the way stablecoins are now a growing top 20 holder of US debt, and major financial institutions moving to have infrastructure on crypto networks. Change is happening even if it isn't immediate or directly visible to everyone.