Decocking a 1911 style pistol with a live chambered round. Why on earth would you ever want to do that. Tactically it makes no sense and is inherently unsafe.
Well how you want to do things today is your call but...
Over one hundred years ago The Army, Colt and Browning were developing the first semi auto pistol for use by U.S. troops. Part of that was field trials. In those days the equivalent of today's SEALs, Rangers, Dealta, etc. was the cavalry. So while the guns were tested by artillery and infantry units the calvary carried weight.
They tested some guns with no external safeties. No go. The soldiers wanted to make the guns safe somehow between firings. To decock like the single action and double action revolvers they were used to did. But these guns required two hands to safely decock. They were also concerned that if dropped the gun could discharge.
So a grip safety was added, among other things, to prevent the gun from firing unless it was held in the hand. But unlike the grip safety Browning had put on the Colt M1903 pocket hammerless this one did something else, more than one something else as the patents describe...it also made it possible to decock the gun one handed. Maybe not as smoothly as a wheelgun but it could be done.
That version went back to trials in the field. Yeah it was better. If my left hand was engaged or shot off I could decock one handed and make it safe and easily cock it again. Not as simple to decock as a revolver but better than nothing. Still if my weak hand was shot off and it was raining, or a sand storm and I was trapped under a horse, or a truck and had the shakes it might be trouble, or sketchy and not as safe as with two hands.
So they added a thumb safety and a plunger tube which did more than one thing as well. They also still kept the ability to decock one handed.
All that made tactical sense.
tipoc