So you are saying let parents decide. Parent - "He Honey let's have little Jonnie take kindergarten again so when he plays pockets lacrosse he is the best. And when he gets to sixth grade lets have him repeat it so he can be "the best player on the field" so he can get one of the 12 lacrosse scholarships on a college team! It's a win win win for us!"
I think the poster is saying to push students to the best of their ability. As a parent you should know where that line is. And yes it is different for everyone. However lowering the kids ability threshold, for the sake of an advantage in a game is detrimental to the kids future.
"Kids aren't robots, they're all different. Who are you to say what age is appropriate any more than the government. Let schools and parents decide." Yes correct on the statement kids aren't robots and letting parents decide is great. Schools should focus on academic achievement rather than sports successes. So if a student is held back for academics it's great for the student. How does academic hold back affect play on the field. It really doesn't unless there is diagnosed cognitve and developmental disabilities which affects perception, attention, memory, decision-making, and reaction time.
But let's be honest, the pipe dream of scholarship and athletic glory is in the back of all our minds. | 
