Darius Miles wrote something in the Player Tribune the other day about his experience coming straight from the hood with a childhood of being surrounded around poverty, drugs, and violence to the NBA and how crazy it was, the lifestyle change, all of the things he didn't know and wasn't ready for, etc. It was an interesting read but he made it clear that era is over.
However, the majority of top 10 kids who could potentially go from high school (keep in mind this usually means a prep school they live at) to the NBA now are kids that have had personal trainers since they were in grade school, had at least one parent that was a D1 or professional athlete, and are from middle class families at the least.
It some ways it is sad, but the reality is that the Lebron James, Wade, Melo era was the last era of the top nba prospects being kids from poverty. Basketball is no longer a sport for poor kids from the inner cities at the highest levels. There are still many kids that fit this description who are good enough to get D1 scholarships, which is great, but the top kids simply had better resources and regimen (obviously with some exceptions) along with the genetics.
Just let kids go straight from high school to the nba. Most of the kids that have that option will make the right decision.