Gambling is different from gaming and the only thing nFT do better at is gaming, the reason behind high demand is because NFT tokens can be used as in game purchases not gambling and I haven't seen NFT gambling projects before
I think NFT is applicable to any content that have "playable" style on it. We could just easily imagine that people are betting their NFT to gamble for another NFT. So i think it's really reliable if NFT implemented to a gambling system, but i also haven't heard about gambling project who adopted it yet but it could.