Mehhhh
Think this is directed at coaches changing players swing. Its not something done everywhere...so....
Every college coach tries to help the kids get better. And that means change.
And, most of the kids...I don't care what level of TB they play...are not ready for college ball. Most of them have never seen a pitcher with real movement and great control. (Again @riseball 's story about his DD practicing control is classic. She was throwing at a knotted rope and hitting it every time. "Great job!" he said. She said, "No, not really...I'm trying to make it kick to the left.")
So, kids playing in college have to become better--better hitters, better fielders, and better pitchers. Getting better means changing.
Again, there are stupid coaches out there...parents, TB, HS college & instructors. I'm sure there are idiots out there saying "squash the bug" and "hit down on the ball."
The whole helicopter parent thing is OOC in HS and TB.