So do hands. If she knows how to point and pull the trigger, she is already more lethal. One doesn't need to be a Navy SEAL to use a firearm to deadly effect.
The bottom line is that without the gun, she has little to no chance whatsoever. Five minutes of indoc on a simple firearm, and she has the upper hand on an unarmed monster.
If you seriously believe that five minutes is all it takes to be proficient with a firearm in a stressful situation, you obviously know nothing about personal protection. Successfully deploying a firearm in self defense requires acute situational awareness, and a reflexive muscle memory.
In the time it takes Ms. :05 to realize she is in danger, she has 300# on top of her. Even if she sees it coming, one hesitation, one fumble, and she is worse off than before.
It ain't the movies.