Safeties are just mechanical devices and they can fail too. To me, putting a frame mounted safety on a Glock because you're afraid twigs or pens getting into your trigger guard is like putting floaties on your car in case you drive into water. No twigs or pens or stray fingers should be getting into the trigger guard of any gun you have. Even the ones with an external safety.
Use and carry the gun in the manner it was designed to be used and no external safety is needed. Especially not an aftermarket system that may not be as reliable.
I agree 100%!
I would not trust a Glock anymore after adding an aftermarket frame mounted safety.
There is a reason why Glock dont come with external safeties.
Now what if your aftermarket safety fails and the gun can fire with the safety ON?
Even worse, what if the safety is OFF and the gun will still not fire?
Carrying with an empty chamber could be a better solutution for you if you dont trust yourself with a loaded chamber and no safety.
Even if I believe that carrying with an empty chamber is just like carrying an empty gun it would still be better than adding aftermarket parts to the gun.