See thing is, everyone is going on who is actually surviving in the show. Does it matter that he's really doing it? No. Him trying to teach survival is all that matter, showing what you can and can't do is the key to his show. He doesn't have to be out there, there is no need, he's done it before.
Both of them are in it for the T.V aspect. Bear always jumping out of helicopters and eating snakes and things are for viewers. Just like Les saying, I'm totally alone I have my camera I'm by myself, by myself, by myself, taping it all, by myself. All of what both of them are doing is to drag in people to watch.
And I'd like to see you prove that Les is more knowledgeable. He too talks to natives before he goes out, just like Bear. Bears been doing what he does in the shows since he was a kid, Les got into it when he was a trail guide type guy. Bear learned from the best, the SAS. I'm sure his knowledge has come in handy when he climbed Everest, crossed the Arctic, etc, leaving him with more expeirence, rather than Les who was just a trail guide.