I don't disagree with your sentiments but no one here called them heroes. They were referred to as gladiators. You know, slaves who fought for the entertainment of the people.
That is a common misconception. Not all Roman gladiators were slaves. Some of them were free men. In some cases they were very wealthy free men. They didn't fight because they had to or because somebody was forcing them to. They chose to step out onto the arena simply for the thrill and the glory of victory. Whatever it is that makes someone an adrenaline junkie, it is a very deep rooted part of the human spirit.