I observed two extremes that both are counter productive to a young player's development.
- Pressing at a young age before the offensive team is strong enough or capable of making the other team pay by beating the press. Any pressure works even if you are not teaching to read and react....the ball just falls in your lap and the game becomes a layup line for who ever is at the top of the press and the rest of the team just watches. No ball movement, spacing or cutting to an opening is taught because the game is just up and down chaos with one or two guys dominating the ball handling and shooting.
-Opposite of that are the coaches who spend an entire season telling kids who are 8-10 years old what they can't do because they have already pigeon holed them into a position. They then spend 90% of their practice running plays and being a puppet master instead of developing skills and basketball IQ.
Coaches are too worried about showing how smart they are and what they can do, instead of letting the kids learn from mistakes/errors and show what they can do.
Repeat above in junior high and repeat again in high school.
In the past you learned to play in the driveway, park, YMCA or Family Center. There was no such thing as a bad shot or bad turnover. You learned from your mistakes and got better from playing kids and adults who were older than you.