Not trying to be rude or anything, but where does it say that Gemini is decentralized? I must have missed that part. And really, the problem is that everyone has become so used to centralization that it's near impossible to get rid of it. I've seen attempts at p2p protocols but none have really taken off (or got shamed for having any relation to crypto)
Also, gemini AND http are decentralized, it's the users who aren't