I totally agree! I started pitching at the age of 10 and did not take a lesson or learn to throw anything other than a fastball until I was in HS. Things were very different 40 years ago!! We didn’t play year round and there was no travel ball.
I instruct girls of all ages and abilities. I don’t teach movement pitches until they are ready. I recently had a parent come back from a tournament and told me that the HC needs her to learn how to throw a screw ball and a rise. She is 14!!! I would actually like to have communication with these HC’s. It seems to me that most of them are not interested in calling pitches in games based on the pitcher’s strengths...they want each pitcher to throw the same pitches. I don’t get it?!?!?!
I think some of them download those charts that say what to call in each situation and then try to use them in games. So they think their pitchers need all these different pitches.
The charts are a nice guideline, but you can make age-appropriate substitutions. They can also lead you astray. Pitching Chart 101 is to throw inside to a hitter crowding the plate. But I have a few students who I instruct to crowd the plate because she can CRUSH an inside pitch but struggles on the outside at times. So throwing inside like the chart says is leading your pitcher to slaughter.
Instead of trying to get too fancy, be sure the pitcher can throw the pitches she already throws first. Otherwise you're just adding more confusion.
By the way, I also love the coaches who are adamant about 12 year olds hitting their spots. This presumes the coach knows which spots to call, which is not always true of 12U coaches. Sometimes a little natural inconsistency can save a coach from him/herself.