I don't disagree that knowledge is different from intelligence, but surely there's a connection between the two.

It seems to me that intelligence has more to do with the acquisition of knowledge, than whatever you have in possession. If we define intelligence as possession of knowledge, then a dog is more intelligent than humans in many aspects (eg. it can smell a lot better, so it can recognize who was recently in a room that it enters). But if we define intelligence as the ability to acquire new knowledge, then humans are vastly superior to all other species.

In that way, it seems possession of knowledge is more like a symptom of intelligence, rather than being intelligence itself.