Fundamental? Yes. Superficial? No.
I believe hé meant superficial in the way that the courses don't go into the deep end of the subject the way a university course might (which is absolutely ok, as it is not aimed at students at that level, but at the same time it means that it cannot replace a real university).
PS. With all that being said, I'm huge fan of KA, and rooting for their continued success. I just think they're better suited to take on high schools rather than universities.