"How do you not remember the names of everybody who was in your fifth grade class? You went to school with them all every day for months! Same thing. Tony Stark interacts with a lot of people in his life, and from his POV, Mary Jane and even Peter wouldn’t have been so important or life-changing that he’d necessarily remember everything about them years later." Come on, there are better arguments than that. You must be able to tell how that's a bad comparison.