It's to show people things that they CAN do to survive, not that he is trying to show up Survivorman. Bear does some crazy shit, and a lot of it is for ratings. But I wouldn't discount what he's trying to show people. For myself, I'll keep an open mind and learn useful things where ever I can find them.
Yes, he's been there, done that. I'm sure he'd be fine if he was really dropped off in the middle of nowhere. But the things he does on his show are not things you can do to survive. They're things you can do if you don't care about your corpse being eaten by wild animals in some odd land.