Fencing coaches are just like most other sports coaches. They assume that things should be done the way they've always been done, just like when they learned it. And they'll be Damned to Hell if they're going to take advice from somebody who obviously knows nothing about (name of sport). This is why S&C coaches working under these people are so often hampered in their ability to just get the players stronger. The sport coach's input is designed to preserve the sport coach's authority, not facilitate the most effective strength program the S&C coach can administer. This results in strength programs that are less than effective applications of the basics, applied to athletes for whom the basics were designed.
Have you ever coached 15-year-old boys?
Unless it's a coach of a women's team, then they just don't give a shit.
"Compared with coaches of male athletes, coaches of female athletes were less likely to know the credentials of their strength coaches, and they were less likely to use certified coaches to plan and implement their strength and conditioning programs. [...] Compared with their female counterparts, male athletes were more likely to have required training, participate in strength training year round, and train using more sessions per week."
I've taught slightly older boys to fly airplanes. I've never found raising my voice to be necessary, even to correct dangerous behavior. I know that consistent, even-tempered pressure from me will eventually produce the behavior I need to see. Some instructors find yelling an important tool, but I see that as an instance of "If you have a hammer, everything looks like a nail."
I'm with Rip.
No troubles at all with teaching/coaching my 3 kids, and quite a string of other hangers-on, all in the wondrous solitude of the home gym. But when Herself ventured in, and actually asked to be coached ... oy. Rarely have I experienced such total and abject failure. This, even when I'd been the one who taught her to drive, some decades ago.
Perhaps you would be more comfortable if I called it 'increased-volume cueing'?
Yell: to say (something) very loudly especially because you are angry, surprised, or are trying to get someone's attention.
Increased volume can can often help to get the correct response. But, this can sometimes lead to frustration for the lifter that's struggling with trying to fix a form problem, and this frustration can occasionally be directed back at the person giving the cue in the form of anger. Sometimes this is even helpful, if that anger helps the lifter accomplish the goal.
But we don't need anybody around here getting divorced because they shouted 'Knees out harder!' one too many times. Hence the warning.
So, you've never coached younger boys under the bar. Just what I thought. Yelling is often necessary when attempting to coach certain demographics, and I hope you realize that student pilots and 15-year-old kids that want to lift weights are not equivalent demographics attempting to learn equivalent materials.