People who need to make mini-versions of themselves in arts & sports are people with mediocre success or even less, who need validations of themselves by making other people kill their own styles to adopt their styles that they feel insecure about. Wanting validation vs respecting stylistic freedom.
That's what I think and how I feel anyway. Whether creative writing, boxing, or wrestling. Some people teach to make mini-versions of themselves because they want to project themselves in their students. (Now, why would they need to do that?) I am not talking about teaching proper standard techniques but the styles.
Like, Peekaboo boxing often crouches down and digs into the opponent while Phillyshell boxing often sways back and leans back to counter. Two opposite concepts, but they work well in their own respective style. It would be stupid for a Peekaboo boxer to teach a Phillyshell student to "lean forward when doing a shoulder roll". Leaning back is what brings up the shoulder to face level to deflect opponent's punch.
Now, is Peekaboo better than Phillyshell or the other way around? The general consensus is that they both pursue different styles, but Peekaboo boxers think their style is better and Phillyshell boxers think their style is better obviously.
The same thing goes for art and creative writing. If an artist forces his own style rigidly to students instead of respecting stylistic differences (whether he THINKS his style is better or not, as the student obviously thinks his style is better and he wouldn't pursue that otherwise), then I want to know if the "coach" is like Steven Spielberg level. If less than that, then they are qualified to teach techniques and knowhows to consult and refer to, but they are not qualified to convert someone else with their own styles and their own voices.
Also, just because someone's own style is underdeveloped at the student level does not mean it is a lesser style. There could still be a point to his art or sport vision. There are WRONG ANSWERS to arts and sports, but there are no RIGHT ANSWERS to arts and sports. That's what I think as an amateur writer.
For the record, my wrestling coach taught three different versions of Throw-By (a technique) and made students pick one according to their body type and the preference. I picked the same version as my wrestling coach because we had the same body type and personal taste in technical motions, not because he forcefully converted me to his style.