I agree with the indigenous people of Alaska that leaving wild animals alone is the best way to protect them sometimes. Humans should leave them alone and then they will leave us alone. Treadwell invaded their home, getting in the way when they were eating, sleeping, fighting and everything else. How annoying would that get! Someone following you around trying to touch you and talk to you and weird voices; I would want to eat the guy too! For the bears who got used to Treadwell, they received a false understanding that all humans are non-threatening, so when a hunter or poacher comes around, they will no longer have their natural instincts to avoid the attacker of fight back. So Treadwell's attempts backfired and did the opposite of saving the bears. Treadwell was dillusional thinking that he was saving the bears. He was on a reserve and there was no issues of poaching. He didn't even need to be there.
However, it is amazing that Treadwell lasted as long as he did. He managed to capture amazing footage of wild life that filmers could only dream of. He was successful in showing the beauty and the true reality of nature. Treadwell did leave behind something that was beautiful even though his death was ugly, which was the nature scenes he captured in his video footage. He wasn't a complete failure, just a bit dillusional.