How many beginners/women have you helped train? Based on having helped train 70 to 80 or so over the last three years, many do have trouble with the DA trigger on a revolver or DA semi-auto. They can generally do okay with Glocks.
If they can't pull a 12 pound trigger on a revolver then I seriously doubt they will be able to quickly perform a failure drill on an autoloader.
And they will most likely have a problem with limpwristing their pistol.
Besides, even though it is certainly not ideal, they can always shoot the revolver single action.
I've trained quite few newbies, but I've never met one who couldn't shoot a revolver DA.