Incredible.
A discussion about a serious safety issue becomes political, complete with cartoons.
The assertion apparently being that "If you make a 'stupid' mistake, you must not be very smart and certainly not of the same idological ilk as superior people such as I."
Here's a fact... as people age, they run into congitive changes that affect their memory. There isn't much you can do about it, but it will happen to you. Guaranteed.
Someday, you will wonder what the hell happened to your favorite box of cereal, only to find it in the refrigerator. You may load you car for a shooting trip, later to discover you packed the wrong barrel for the gun.
People do these things because they are people.
The snap cap issue is really quite simple. There are steps you can take, before the accident occurs, to reduce or eliminate the risk.
Don't think stuff like this can't happen to anybody, including your brilliant self.
In aviation we like to see young aviators realize their own fallibility at an early stage. It's always pretty easy to set up the cocky ones for a lesson that either leads to some personal soul searching and a change of behavior or to elimination from the program.
Everybody will make mistakes in life, some more serious than others.
A snap cap is nothing more than a time bomb.