I thought that way too, however if the attacker has drawn the weapon already, the weapon is most likely cocked and the safety has been deactivated. Usually all that’s left is pointing it and pulling the trigger. The only guns I’ve fired are an AR-15, SKS, and 7mm magnum. They’re all different in the safety and cocking. If I was pointing one at you and you took it from me, all you’d have to do at that point is aim and fire. Unless of course i skipped a step when I drew it. But I’ve never fired a hand gun. I’m pretty sure I could aim and pull the trigger, but if I’ve never fired any real gun, it may not go that way, especially under stress.