My left hand is just as dumb as a box of rocks, my entire left function is weak and confused, and I still try to train a little there is probably nothing more important than versatility in training, whether it's learning how to shoot in varying light levels, revolver and autoloader, varying sight types, bit h rifle and pistol.
Let a friend beat you up before practice, let him whack you on the head, bind the left hand, tied in a chair, on your knees, heck, try while neck deep in the water.
have you ever watched very technical, martial arts competition, not the bs mma or television rights? The genuine martial artists learn dozens, hundreds of strikes and blocks, work out, learn how to knock the crap out of anyone at any time, anywhere, but does the average, ordinary guy learn anything much beyond trigger control and other basic techniques?
Even the great competitors use pretty limited crazy, unexpected stuff.
A couple things that surprised me were two things I read years ago. One was about a test firing under a garage door. Competitors had to drop and nail three plates with a half foot gap.
Another test had two score busters. One required the competitor to retrieve his pistol from a car and he was tagged from the back seat. Later in the test a marked magazine had to retrieved and used co complete the course, but there weren't enough to complete the course. There were a full load of loose rounds a few feet away, those rounds were necessary to finish the course, it was an automatic failure if the competitors missed them. Not enough rounds to finish the course even with a perfect run.