Why do you say that?
Here is my theory on Grizzly Man, I think mofo wanted to die by being killed by a bear. Apparently he talked about it before.
The evidence to support this was he would either go and/or stay later in the season when the bears were hungry as fukk. Also he would camp in an area that was filled with bears who were not familiar with him and his ways.
Grizzly Man is an interesting movie though. You got to watch three times. Once just to watch it. Second to watch how gay that mofo is, who clearly repressing his homosexuality. And the third to pay attention to other mofos in the movie who indulge him, except maybe the pilot who is like "this mofo crazy as fukk".