A lot of intelligence? I know there are lots of things I don't know, and I even know what a lot of those things are, but I don't know that this really takes a lot of intelligence.
Compared to a clam, maybe. I am definitely smarter than a clam. Probably.
I think the person who knows and accepts they don't know things, and more importantly will refrain from opoining on those things is more wise than the average person. Maybe not more intelligent but definitely more wise