It's not a statement on reality, but a statement on perception. One I agree with as a guy. I don't really know how to deal with a bear, but if the hypothetical involves any indication of oddness, I think I'd rather risk walking away from a bear than finding out if there's a crazy looking for their next victim.
Sure, the person has more positive possible outcomes, but if my intention is to stay alone, why go through the risk? Hell, my antisocial ass would probably start acting weirder to try and scare them!