Most people don't think about certain situations or disadvantages until they're in them/experiencing them personally. There's simply too much stuff out there to know about all of it. As someone mentioned, after he had his accident, he could've spent his time and money sulking, or paying doctors to solely give him drugs, therapy, etc. Instead, he also sought to help others with a disability like his own. I wonder how many people here would, after having their life changed in such a way, make an attempt to help other people in any way.
Besides, from what I saw, he never asked for public acclaim, nor to be called a "hero."