I can assure you that my son who is starting his last year of D1 threw at least 90% CBs since 10yo. Never injured and never missed an inning of BB due to sore arm.
He was over used and when he was tied they told him to stay with the off speed stuff. They told him that because they knew it was less stressful than his FB. As a midget he pitched 4 times in 5 days and faced Leaside who were the top midget OBA team in Toronto that year. He just threw CB after CB and they were not as good as he normally threw them. He picked off 5 guys in that game and threw right into the 9th until he loaded the bases with lack of control. The coach took him out and the coach came over after the game and was laughing. He said I have coached you son since he was 9 and he never yelled at me before. He said he had them right where he wanted them. Bases loaded and 1 out.
If you ask my son what was stressful on his arm it was the FB.
People just hate being shown up by a guy throwing slow mo.
cchs07 maybe they know more than you do about CBs. It was actually Tom House that 1st mentioned that CBs were not harmful if thrown properly.