these teams play too often. I have seen GMs discuss this and say they will take an equally rated European simply because they don't have that wear and tear on their body.
The guys who succeed through AAU ball are the ones with good families that make sure their kid is getting better either through their own coaching or insisting on private or more coaching from AAU or high school coaches.
Richie getting up at 5am to workout. Shooting 200 shots in a gym a day is going to help your shooting more than playing what is essentially a pickup game every day.