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The problem I have with this mindset is that ignores three important facts. The first is that safety is based on training, specifically with regard to rule 3, and using equipment to overcome a clear training/performance flaw is not appropriate. If you are not ready to press the trigger, keep your (adjective/gerund reference to recreational interpersonal transitory gratification) finger off the (same word) trigger. This is a psychomotor skill issue, and a negligent discharge is a result of a personal performance flaw, not equipment. The second is that the long(er), stiff(er) trigger press is harder to train with in terms of necessary precision (remember that the square range is not the test - the two way range is). Related is that the transition from that initial DA press to the much shorter/lighter SA is also difficult. It may be possible to train to overcome these last 2 (it is mandatory to overcome the first), but it is a lot harder, wastes precious time, and serves no appropriate purpose. From an agency/personal liability perspective, an area in which I have a background (we don't have an icon for lawyers here, but I is one, and this is an area in which I have written and taught) the above is the sound perspective.
And thank God some others are pointing out the trigger reset training scar. This is not a target match, it's a fight. What I see from people who teach fighting with a firearm is that they have (AFAIK) completely gotten away from advocating paying attention to the reset. I have seen several link to the video of (Rob Leatham, I think) in which he repudiates reset as an issue to consider.