Unless youre completely invulnerable, your enemies are going to be punching you in the head. A lot. Boxers also make a career out of getting punched in the head, but in these cases there are referees, medical teams, rules, and tons of safety precautions. Also, the boxers arent attacking each other with murderous rage or defending their lives. Still, boxing can lead to a condition called chronic traumatic encephalopathy, a whole slew of brain problems with such symptoms as memory loss, dementia, and motor problems (like Parkinsons Disease). Also, getting your nose and facial bones broken repeatedly doesnt do much for you in the looks department. You could end up with a nose thats permanently crooked or scar tissue all along your face. Fun! Even if you dont get punched in the face a lot, the stress on your body isnt going to be pretty either. Theres a reason why former athletes often become sports commentators. Plenty of sitting down. So yeah, being a superhero looks like fun, but when you really think about it, maybe Peter Parker isnt so whiney after all.