It already exists, you're describing the open weights AI. The only reason they aren't "dark" at the moment is that it has no reason to be dark.

In the fullness of time, though, we'll also see previous-gen frontier models leak out of their labs and then get their censorship removed. It won't be as good as never having had it in the first place but it'll work just fine. It is likely a momentary and transient occurrance that the AIs can only be run with super specialized hardware. Eventually the weights, which are just big piles of numbers after all nothing terribly special about them other than that, will not be something that can be kept locked away completely and forever.