OK.. I am not trying to be a smarta$$ but, enlighten me. I grew up with older weapons like Winchester '73 '97 '06 '62 and was taught that half-cock was "safe"
If you have a 1911 without the firing pin lock and you are carring hammer down and it gets a blow to the hammer the gun will not fire.
If you have it on half cock it and it gets a hard blow to the hammer it can break or bend the sear and the hammer can strike the firing pin hard enough to fire the round. I personaly know of this happening.
Even if it does not have an AD you have just put your pistol out of action untill you can replace the sear.
The purpose of the half cock notch on the 1911 it to stop the fall of the hammer if it slips off the sear from full cock or if you are cocking the hammer and you let it slip.