The advantage of using tags like "IT Management" to tag questions related to that subject is so the community can experiment with different types of questions to see if they fit the constraints of this site. If they don't fit within those constraints, the posts can easily be moved by tag.
Should questions we're not sure about also be marked with a tag that identifies the question as possibly not fitting? Would this be a good way to experiment with different topics without forcing the question of their relevancy to be answered right away?