3. Why are action comics so detailed?

After asking this question myself, I reflected on this idea of why comic strips like 'Batman' or 'Superman' are so detailed, and i think it is to give the action more realism. In giving more detail, it makes the reader feel like the action is more realistic as opposed to just a smilie face flying across the sky. It also takes the humor out of the comic if it is a more serious storyline.