Not all safeties are created equal. Some are push button style or switches that need to be toggled, possibly could have helped in this case if it was accidental. Others, like one of mine, simply need the gun held properly to be able to fire, most likely that would not have helped this situation. Safeties are predominantly meant to prevent misfires by dropping it, or mishandling the weapon.

However, one of the core gun safety rules is to never point your weapon at anything you do not intend to destroy. Safety or not.