Let’s for the 27th time say the kid has a learning disability or he isn’t socially ready. By all means nobody should be embarrassed for holding their kid back. The embarrassing part is playing with younger kids in a youth sport. Play age with the sport. Be held back for school for those reasons. That’s what kids in the 6 other sports do. Why is this so hard for you to grasp. I can’t even understand that such a clear thing is a debated.