Magic's a pretty big field. Some people specialize in certain things, while others are generalists. I'm more of a generalist -- at least I remember doing lots of different kinds of magic, and my teacher told me that unlike his other two students, the reason he took me on was because I'm a stubborn bitch who could tell the universe to shut up and do what I say. I remember working with specialists before, for detailed stuff that was right in their field.
It's like... you remember being a solider. But you weren't an expert on every kind of weapon or every kind of terrain, right?