I can’t believe with all the years I played and coached I never gave this question any thought before. Going back to LL through college (recruited as OFer/pitched some relief first two years of college) I could fall out of bed throwing to location. My son was the same way (pitched through high school). Once coaching my 13u to 16u travel team we had a pitching coach with AAA experience. I didn’t give pitching detail much thought.
I was having a chat with an ACC pitcher’s dad at a game. His father bemoaned against lesser non conference teams his kid has impeccable command and dominates. When he gets in ACC games he tries too hard, grooves a pitch and gets pounded. To me, this is mental.
Through high school the dominant pitchers get away with smoking most of the lineup. Command isn’t as important.
Where does command come from? Is it learned? Do you just pitch until it comes?