Let me rephrase your question:

"What's wrong with, say, Psychology, that makes so few men enroll?" or "Why there are so few men graduating from fashion schools?"

I agree that looking at the whole picture explains it better than looking at a very small part of it and wondering, "if 50% of this picture is mostly green, why all I see is blue?". The answer could be simple: maybe you are looking at the sky.

When I graduated in a, say, 50 people class, 4 of them were women. Apart from the fact that we went to separate toilets, there was not much of a difference.