Very few bother to read there lol
I think you have answered yourself mate - most users in this forum are mainly focused on bitcoin related themes hence the need for other subjects that aren't related to it doesn't have the same amount of dedication/support. Plus, I do also believe that the subject fits rather well on the Altcoin section (as others have said).
I don't know the work that would have to be involved in creating a new section right here (and "hiring" a moderator for it perhaps) but I'm sure that this decision is always based off in the amount of activity that it may generate (based on the fact if there is already a great amount of discussion for it to be moved there). And the fact is, as far as I'm aware and using the previous threads linked by mk4, there isn't close to such a huge amount of discussion here to make it worth setting up a dedicated section for it (at least from what I can see).
Now you might also have a counter argument - "Of course there isn't because there isn't a centralized discussion for it" - and I tend to disagree with this point of view simply because if there was such a common interest in it topics would be popping up left and right and discussions would be generated at a far much higher rate that they are currently being made. I've managed to find some similar thread asking for the same thing, you can read up about more discussions regarding this theme here[1] and here[2]. On the last thread Charles-Tim gave a rather short yet concise reply regarding this same topic, quoting:
NFTs are altcoins, non is yet built on Bitcoin blockchain, even if built on Bitcoin blockchain, they are still altcoins. No even DeFi board, then why NFT? No bad for all to be in Altcoin boards.
Correct me if I'm wrong, but I do think NFTs aren't considered on ALTCOINS right?
They are all altcoins, also DeFi are all altcoins. Only Bitcoin is Bitcoin, any coin or token other than Bitcoin are altcoins.
If you think NFT threads are numerous enough to be given a board in Altcoin section, then you can make the proposal on meta here with evidences, but I do not think there are much NFT threads on this forum yet, not yet deserves board.
[1]
https://bitcointalk.org/index.php?topic=5223103.08[2]
https://bitcointalksearch.org/topic/nft-board-soon-5350051