They also get all excited and think they did something right when they hit a lazy fly ball and the outfielder turns it into a triple.
At the youth level I would rather have them learning. Kids learn all of the time. We teach during games when the lesson is fresh whenever possible. It seems to stick with them better. Like swinging at a curveball that started thigh high and ended up in the dirt. Great time for a little reminder.
If its high let it fly, if it's low let it go. Take your hacks. Try to go oppo with it. Take it up the middle. Take one for the team.
Simple stuff.