the whole point of my arguing is the percentages and probability.
why do people rely on gross motor skills over fine motor skills? because they have a higher chance(percentage) of performing the action successfully. instructors, idpa shooters, and self defense instructors say that when you are in a high stress situation(use of gun in self defense), results in the loss of fine motor control
The debilitating effects of combat stress have been recognized for centuries. Phenomenon such as tunnel vision, auditory exclusion, the loss of fine and complex motor control...
http://www.killology.com/art_psych_combat.htm
and when in a life threatening situation, you do not have seconds to fumble with a tiny slide release. you use your left hand grab the entire slide, and yank it back and let go. you have just successfully reloaded or chambered a round.
however, putting your hand on the slide increases the chance you may shoot yourself
holding a gun with both hands by the pistol grip, and pressing the slide release with your thumb has a much lower percentage of shooting yourself.
its much harder to shoot yourself while holding a gun with both hands using the slide release. Unless you bend your elbows and point the gun directly at your head(underneath your chin), it is hard to point the muzzle at yourself.
try it. hold a gun properly with both hands and try and point it at your body without grossly bending your elbows
certain actions have a higher percentage of risk and success compared to others. if you feel that all actions are equal in risk and probability of success, thats your opinion, but nothing is ever 100% so you can't always say follow the gun safety rules and everything will always be ok.