Bear attacks are incredibly rare. Even brown/grizzly bears just want to be left alone, the only bear that actively hunts humans are polar bears. If you're attacked by a grizzly, it's because it thinks you're a threat, not food. Now, true, if you do piss off the bear, then you're probably fucked. So I'm not saying bears aren't dangerous, but that their level of danger can be predicted and avoided to at least an extent.
You can't really say that about people. Most men are good people and would help you, so on average they're safer. But unlike bears, you have to ask, "what if they're one of the bad ones?", especially so if you're alone in a forest with them without the punishment of society to deter them. I mean, 1 in 6 women in America have experienced either attempted or successful sexual violence, and again, that's in a society where they can actually get punished for it. So it's not exactly a statistical anomaly that the man you're stuck in a forest with is a bad actor.