Back on topic.
There is always an inherent risk when handling a loaded firearm. Can it go off on its own? Yes, due to its mechanical nature. But, the percentage of accidental discharges are very, very low. Most discharges are of the negligent kind (taking human intervention -- finger on the trigger, poor holstering skills, modified safeties, etc.).
So what is the remedy? Proper training with good equipment while practicing the redundant safety rules. Appendix Carry: Practice drawing with an unloaded gun to start with until you feel comfortable with the procedure and are doing it without pointing the gun to yourself or placing your finger on the trigger. Remove your holster before re-holstering and then place both items back into the pants.
Please remember that any form of carry can be dangerous if done improperly.
I hope this helps you friend.
Good list !!
You left off "poor firearm design" however.
Glocks have poor design.
They are designed to have soft "double action" like triggers for their striker mechanisms.
This is why they are easy to set off and shoot you in the leg.
With any other pistol or revolver you can ensure that a safety is engaged to prevent an accidental discharge.
With a revolver you can keep the first 2 cylinder chambers empty.
With a 1911A1 or some such derivative (like my CZ), you can use condition 1 or 2.
But with a Glock there is no such thing as (Cooper's) condition 1 or 2. There is only condition 0 or 3.
The Glock safety is passive and weak.
If I owned a Glock (which I never would), I would carry it in condition 3 only -- magazine loaded but chamber empty.
Then you can't shoot yourself.
Even so however, Glock-design or 1911A1-design, the very best thing is to ensure that your gun (pistol or revolver) is not pointing at your body parts while in the holster (or any other time).
Rule #1 -- Never point a gun whether loaded or unloaded at anything or anyone that you don't intend to kill (including yourself -- this includes your balls too).