Frustrated with Grizzly Man

The juxtaposition of "Grizzly Man" with "Across the Wire" made me especially frustrated with Tim Treadwell. While we watched the first half of the movie, I kept thinking, "What a waste!" Here is a healthy man who has the means to live each summer off the land without working and spend the rest of his time touring and talking about how we can be nicer to bears. At the same time, people are suffering from diseases, exploitation, starvation, and abuse around the world. I can see how someone like him, healthy and resourceful and full of energy, could make an impact among his own species which is certainly suffering much more than bears in a protected wildlife area. I do understand his dream to connect with wild animals and recognize his idealism and desire to live freely, but I just don't understand how he convinced himself that this is the best possible use of his life, or the life of his girlfriend. Maybe they never asked themselves that question.