My revolver has the pin on the hammer, but it has the firing pin block, no problems leaving it on a chambered round. I am confident that it wouldn't go off if struck. I don't know what would cause the bowling ball to set it off in that link, but it did. If you are carrying an old enough revolver that it goes off if the hammer is struck, you need to leave it in a curio cabinet or something, it's unsafe. I don't know if firing pin blocks can malfunction, but they are man-made, so they probably could...?
Kirk is just saying carry in the manner where you are least likely to damage you or someone else. That would have to be on your hip OWB. Appendix, pocket, and shoulder are all in more dangerous positions. Ankle is better, but not as safe as on your hip. You are PLANNING for it to go off. It doesn't matter if it is unlikely. It's also unlikely that you will ever need your gun in a self defense situation. That doesn't mean you don't carry.
Kirk is just saying carry in the manner where you are least likely to damage you or someone else. That would have to be on your hip OWB. Appendix, pocket, and shoulder are all in more dangerous positions. Ankle is better, but not as safe as on your hip. You are PLANNING for it to go off. It doesn't matter if it is unlikely. It's also unlikely that you will ever need your gun in a self defense situation. That doesn't mean you don't carry.