Youth Baseball Batting Advice

From Ask the Baseball Pro:
Tom wrote:
I help coach my son’s 12u travel team. I was working with one of the boys on the tee when the head coach came over to add some advise. I was having the player stop the bat at impact so I could evaluate where the barrel was making contact. The head coach stop the player and adjusted the tip (barrel end) of the bat up……stating that this was the proper angle of attack. I haven’t found a single picture or video that backs him up. Later I told him he was mistaken, but he insists that the proper angle of the bat tip is up not down at impact. I don’t know how this is even physically possible. He said it’s what he’s learned at camps. Can you help to straighten this out?
Thanks!

From the Baseball Pro:
Tom,
Many people/coaches teach just what your coach is stating. But unless the pitch is shoulder height, it is almost impossible to do. Without getting to complicated, the idea behind his theory is to use the top hand. Many players dominate the bat with their bottom hand, thus pulling it through the strike zone. So in order to use the top hand more, people teach theories such as this one. But in reality it is impossible to consistently do, especially on a pitched baseball. So common sense tells us we probably need a compromise and use both hands equally.
Your Baseball Pro, Steve Holm