|Why is this man called a "hero" for doing what comes naturally?|
Here, we have a great example of the word's overuse. The Huffington Post headline blares: "Real American Hero Saves Kid from Getting a Bat to the Face." The man, probably the computer-involved boy's father, is making a quick--and laudable--reaction to a threat to the child. Even if the kid is not his, there are few of us who would do anything different than he is doing, if we were sitting where he is sitting. You will note that the man in front of our "hero" is doing the same thing, but he missed the bat.
A few of the people are shying away, but they obviously have no dog in the fight and don't care if the kid gets brained. Or maybe they are cowards.
In any case, the man stopping the bat is not a hero ... except maybe to the kid.
My suggestion is that if we reserve strong words like "hero" to appropriate situations--say protesting at a Donald Trump rally where you know you are going to be clobbered by a private army--then it regains its power.