Not necessarily. She probably threatened suicide, so he gave her an unloaded gun. Now had he provided her with a loaded gun I might be more inclined to agree with you. Not the avenue I would take, nor obviously you, but sometimes parents do stupid things too. But if they work then perhaps they were right in following that avenue.
I can remember threatening suicide once when I was younger and my parents just said well go ahead & do it. Realizing that threat was useless it was never employed again. 8>)