Interesting thread.
I find myself in agreement with the sentiment that there isn't a good substitute for good fundamentals. Luck can fall one way or another, but good fundamentals makes for good preparation.
Over my years of arts training I always found the better prepared folks were those who didn't loose sight of their foundation skills. They continued to revisit their foundation, refining and looking for new insights into the foundation skills upon which more 'advanced' skills were developed. Constantly renewing an understanding of the foundation upon which everything else is built is nothing to denigrate.
As a LE firearms instructor I respected the older generation of LE folks who learned to use revolvers in their work. Granted, I might be a bit more inclined to grant them that respect ... seeing as how I came in on the tail end of the revolver era in LE, myself.
I carried a M66 and then later a M686 as issued weapons for several years until we adopted 9mm pistols.
Many of those earlier revolver users may not have been as anxious to transition to the new-fangled high capacity semiauto pistols as the younger folks, but a good foundation of traditional double action revolver skills can make for some good pistol shooting skills. Being able to smoothly cycle a heavy DA revolver trigger while using the sights as necessary to make effective use of a limited number of rounds available in a Magnum revolver does seem to make for some effective pistols users upon occasion.
Personally, I always found it easier to help a revolver shooter make the transition to effective pistol shooter than the other way around, especially if the pistol user had developed his/her skills around the philosophy that having a light trigger and a high capacity magazine offset the need to develop a good foundation regarding shooting skills.
Pain hurts. Being surprised and unnecessarily distracted by pain can cost awareness, attention/focus and time better applied toward surviving the moment. Training can help to work through it and lessen the perception of it.
Foundation skills. Shooting, like other physical activities, is generally considered a perishable skill set and often requires sufficient practice in order to effectively retain a high degree of those skills, especially under stress.
Mindset, mindset, mindset.
Consider reading a book called
FORCE UNDER PRESSURE, How Cops Live and Why They Die, by Lawrence N. Blum, Ph.D.