[PowderMonkey]

Your right. They don't. Most people who haven't used one in 30 years need the muscle memory for a fine motor skill, in order to maintain a consistently hard grip, especially during a double tap. Most people tend to shift or change their grip in response to recoil. That affects accuracy and can cause a semi auto to jamb. I own many Glocks. Outstanding pistols. However, If you want one to malfunction while firing, all you need is a weak or shifting grip between shots.

[TalonDJ]

You don’t need the grip strength to overcome malfunctions in most pistols. you just need training to have a proper and consistent grip. You don’t need to be double tapping to own and use a pistol for self defense. A lot of pistols will function well even with a weak grip. Better to pick one that is forgiving than to have to work out your grip. Especially for a home defense gun if you don’t plan on practicing a lot.