Oh man, I'll probably regret this but what the hell.
I practiced martial arts for many years. Kata, Kumite, endless drills and testing...it was all very formal and there were many rules. It looked great and we did a lot of yelling. Then came a day when I was forced very suddenly to really defend myself. When it happened it was totally unexpected, but the techniques I had learned over the years all worked very well, though not at all in the stylized and aesthetic way in which I had learned them, and I ended up safe at home with no injuries to me or any of my friends. Funny thing was, the instant the crap hit the fan all formality and rule structure evaporated and I just did...automatically...whatever I needed to to in a very fluid situation to not get my head kicked in by a psychopath who was much larger than me and not feeling pain the way I had been taught that he should.
Unlike my classes, it certainly wasn't pretty or elegant and I didn't even get to yell. But whatever happened just seemed natural to me. It did not involve the use of weaponry, true, but I think the concept is basically the same. I felt that my safety was under severe threat and acted accordingly.
I think that all skills...shooting, martial art, visual arts (my case), driving, negotiation, whatever...are transferable to other situations in life and people who tend to function "in the moment" can usually adapt on the fly to whatever is happening as it happens. The danger comes when we let or even expect the process of skills development to default to the level of habituated response. Habit will sink you in competition or in real life. When I hear the term "muscle memory" I think of programmed automated responses (muscles don't have memory) or habits. Forging neuromuscular pathways however (like we do when we learn to walk) lets us use our skills in the most efficient way possible in a given situation. Example: On our way to the fridge for a beer we see the last slice of pizza sitting on the counter and we suddenly decide to change direction...and we simply do it. Voila;a practical and fluid application of a learned skill.
Right. I'll shut up now.