Statistically speaking you stand a better chance of surviving a dog attack than a bear attack so the risk whilst still present is definitely offset by the severity of the attack.
Also I think her handler was super irresponsible for handing off what is in effect a wild animal to an actor who has only ever done scenes with the animal? Surprised he was allowed to do that.
I would assume she might have been happier in a sanctuary but you know I don't work in the industry so...