I really thought this was going to be in another direction, so here is my 2C for that:
Our trainer was a meeean man. He made us do stuff that showed our weaknesses like pimples on our noses. In one scenario he put our handgun, usually a Beretta 92 or Sig 228, under a cloth or hat. There would be at LEAST three targets to shoot after retrieving it and diving behind cover. Heh. Except that when we ripped off the cloth, there was the gun and a box of cartridges, NO MAGAZINE! That also means after each shot the slide did not lock back. Like I said, meeean. Just mean.
It might have been "fun" to do that with either a Colt Detective Special and S&W Chief Special, just to see who knew which way the cylinder turned. Thankfully he didn't do that. I looked bad enough as it was.
BUT, the OP means cocking a DA revolver for each shot. If he makes that work, no problem. I've seen Cowboy Action Shooters fire their Colts and Rugers so fast they sounded like semi-autos. AND, they hit their targets.
For me, the Sigs and Berettas and the like were "point and shoot." Worked the same way every time. We carried the Berettas with safety off, using it mostly as a de-cocker or "administrative safety." Our trainer believed that the extra move needed to swipe off the safety was just that much more to train to do. It would be different, of course, for uniformed officers carrying their guns in plain view.
But, to revolvers. Handed a Model 28 (I think - it was a long time ago) and told to hit a gourd at 20 meters with the first shot, I found I had to relearn how to work the trigger, compared to the semi-autos. The long pull made me greatly tug the gun off target. MY failing, to be sure. Sooo, I wanted to cock the hammer for each shot.
And then I watched Walt Rauch shoot a J-frame double action, center punching the target shooting from the hip out to 7 or 8 meters. Then shooting double action one-hand out to 15+ meters for head shots, holding the gun at eye-level, though I was not sure he actually aimed with the sights. When it got to 25 meters he held with two hands and stitched up the zipper to the chin. That was a 2" gun!
Some years before, I found myself holding a S&W 25/.45-Colt, facing an agitated assembly desirous of deterring us from leaving a hotel. Single-action would have foolish, at least for me, if for no other reason than that *I* was a tad "agitated."
When I next had the opportunity to train with a revolver I restricted myself to double-action and have ever since.
One consideration for a self-defense purpose is that you may be grappling with one or more attackers. A LOOONG time ago, my best friend and I were attacked by six thugs on the streets of gun-free Chicago. I plead guilty to not being sufficiently alert to the threat, which allowed them to come into arm's reach. They were then on us in a flash. IF I had been carrying a revolver, one-hand, double-action would have been the only way to respond.
All that babble looks more like 4 Cents.