There was a time when intelligence was viewed as a single concept, but that idea appears to be out of vogue, and for very good reasons. To use myself as an example, I’m pretty good at identifying and solving abstract problems, but put a hammer in my hand, and I’m hopeless. Different people have different abilities. That’s just the way it is.
Is “character” a monolith? For much the same reason, I don’t think so. If sexual fidelity equated to reliability in politics, many of the world’s greatest politicians would have been miserable failures. And then, on the other hand, you have Charles I, who was faithful to his wife, but who never otherwise kept a promise in his life, and paid for it with his head . . .