Coaches are the best teachers?

We are agree with this affirmation because we both have been in different sports like rowing, padel an others, and we have experiences with differents coachers.
When we met our coaches, at first you think he is so serious and he only wants to annoy you and he doesnt mind about how would you feel in their trainings. At first you can't say that what he is doing is completely correct or if it is healthy for your phsysical (or psichic) condition, so you only get angrier and angrier with him and you feel that he is a monster or something like that, because he don't care about you.
To start to understand your coacher at first you must to ask your self differents questions and change your mind. People use to see only the bad things about a training, only the disadventages, but when you start to noticed that the trainings are making you better in the sport you don't think that it is too bad.
So when you start to talk with your coacher about how do you feel about the trainings, about your camarades and with the competition you see that he really cares about you and he only wants to drive you by the way you get stronger.
Thats why we think that coachers are the best teachers because they play to rols with you: the teacher rol and the father rol, a coacher knows you better than your parents because he is with you a lot of time and know perfectly your feelings because you feel safe talking about your issues with him, so they are the better teachers of the most difficult subject, the life subject.