Times and attitudes change. People discover things that can, and cannot be done well with any system, over time. And advice from experts is nothing to be ignored, however, you have to factor in their target audience, and how it relates to you.
My first experience with a centerfire DA revolver was my Dad's Model 28. It was, for decades, the "cannon" of our handguns. First handgun I ever handloaded for. Truly one of the finest examples of a revolver in its class ever done.
I had no idea the can of worms I opened up when I said shoot it the way you want.
I have seen the experts, and general opinions change over the years. Today there is a huge emphasis on DA shooting of DA guns. That is attitude. And opinion. Nothing wrong with it, until you take it too far.
shooting a D/A revolver S/A is a habit that could one day get you dead.
An interesting quote, and possibly true in an extremely rare situation, one only a tiny fraction of a percent of handgun owners will ever be in. And the odds are quite high that of that tiny percentage, the majority of them will be LEOs.
I'm not. And neither are the majority of people I know who have handguns. Neither is the majority of the shooting public. We simply are not going to be in the same kinds of situations as police officers.
If shooting it DA was the only way to do it, why do the makers put the SA capability in the guns at all? Obviously DA is not the only way that is useful.
Waaay back in the day, before men like Stubby McGivern, Jordan, and others showed the world what was possible shooting DA, the DA mode on the revolver was generally considered an emergency feature.
You learned to shoot SA, aiming carefully, for each shot. DA was there for that emergency close/point blank shot, & rapid fire. Especially the rapid fire part.
Extremely fast SA shooting was well known, and for many many decades after the introduction of good DA guns the draw and fire speed record was still held by the SA revolver.
While the SA for accuracy and DA for emergencies worked pretty well (and still does) for the majority of shooters, those who were LEOs needed something better for what they did. And, over time, techniques were developed that were a huge improvement, and increased the odds of success in a gun fight. Most of us, however are never going to be in a gun fight.
Accurate (and hopefully fast) DA shooting is a worthwhile skill to have. Might even be the deciding factor in some situations. But to say its the only way to shoot the DA gun is fallacy. Might be the best way, for some people, but as a blanket pronouncement, covering all situations, it is patently false.
Saying "SA shooting will get you killed" is even worse. More than a few people survived gunfights using Colt SAAs. If single action gets you killed, why weren't they? Its a classy sounding phrase, the kind you would use to inspire and focus troops you were training to shoot DA. Like a lot of things I got told in training, in the outside world, it's simply not true.
Hesitation, taking time to choose between one mode and the other, that, I would think, is more dangerous in a defensive situation than shooting in one mode, or the other.