This! For some reason this kind of attitude seems to be fairly common among a lot of art teachers, sadly
thankfully it seems like the newer generations are not like that, so there's hope for the future, I guess!
Also argh, sorry about your experience with your scientific illustration teacher
I had a similar experience in Uni with an exam, so I feel you. But yep, thankfully not all teachers are like that, lol!
I also used to have a rather intimidating teacher during my first year in high school... he'd criticize all my drawings and then tell me to sit aside and watch him as he corrected it. And then he'd basically redo the whole thing from scratch :'D one time he got so excited about it that he actually asked me to bring the drawing the next time so that he could finish it XD buuuut... you know what? But the end of the year, I ended up really appreciating his method: sure, he was weird and it was annoying to be pushed aside and all that, but watching him work teached me a lot more than being simply told what to do would probably have. By the end of the year, my art skills improved immensely and, looking back at my first drawings, I could definitely see why my teacher would criticize them.
Alsoooo... aaaw, thank you for your sweet words! <3