I have done a lot of shooting and been in a few situations which could have gotten pretty dicey without ever having been shot at or fired a shot at anyone. But I wonder how many of those folks who study and read and watch videos and play with guns ever really have used or even carried a gun for any serious purpose. I have little trouble envisioning someone confronted by a real world bad guy spending an hour or two trying to figure out the proper grip, optimum draw, appropriate remarks ("draw you scalawag" vs "fill your hand"), etc., etc.
My instructors, back in the olden days, always seemed to have the silly idea that getting a shot into the right place fast was more important than having the right pose, correct posture, proper foot placement, proper superior smirk, right color of shirt, etc. From some things I have read and seen on these sites, folks often seem to be preparing for a Hollywood "gun fight" rather than a real confrontation with sudden death a very real possibility.
I won't ask anyone for "credentials", but based on my own knowledge of the approximate number of real gun fights in the U.S., I wonder how many "internet experts" have ever 1) carried a gun routinely except as a LEO, 2) carried a gun for personal protection where there was real anticipated danger, 3) engaged in a gun fight, 4) killed or seriously wounded another person, or 5) been shot or shot at.
Jim