Wild bananas exist, but the fruits contain seeds. Cultivated varieties are mutants/hybrids that do not produce seeds, so they have to be propagated by cuttings (or offset shoots, which appear around the base of the main plant, but that’s the same thing really).
As long as the wild species and varieties still exist, I see no reason why the work done to bring them into cultivation cannot be repeated - we wouldn’t end up with a variety that is exactly the same as what we have now, but that might be a good thing.
Personally, I think it’s a conspiracy to make us eat more bananas; I’m happy to oblige.
Actually, it is a scaremongering conspiracy to support genetic modification research a guy (Frison) is doing in Europe, in my opinion. More info in previous threads here and here.