Very good point and good tactical practice. But if they are inside your "safe zone" then use this.

Hey Anthony, great question. If she were to just "hang on to the gun" then the attacker would eventually figure out that they have a second hand to punch, choke, attack with and take your back. Part two (not shown) would be to attack the posture of the assailant. She could turn aggressively (using a c step) towards the attacker while rotating the gun in a clockwise circle (away from her/towards him) to affect a serious wrist lock, or use her right leg to perform an osoto gari leg sweep, or several other options other than standing still.