CD all the pitchers in our area threw CBs at a young age. They were taught properly. In fact it was Tom House that said CBs if thrown properly will not stress your arm. All the guys who threw hard at 14- 15 were having arm problems. Several of the hard throwers had TJ surgery.
The [roblem is that once people get a thought in their head about CBs being harmful they can't admit that they were operating on misinformation. Evem ASMI has shown that they are misinformed.
My son would probably not have played college ball without his CB.
The other thing is he also had a great CU and he struck out a lot of elite players with his FB including guys who played D1 and pro ball. That includes a guy who played at CC and now is with the Angels. 3 CBs for 3 strikes.