When I was in my forties, and going through some heavy personal stuff, I finally and fortunately realized that I am not God. I realized that people had accepted my imperfect self for my whole life. I didn’t always feel the same way. I was a snob about many things, spelling and grammar among them.

Today, there are many things I still don’t tolerate and accept, but they are the bigger negatives in life. I am much more likely to accept smaller things, like incorrect English. BUT NOT FROM A PROFESSOR!!! I would definitely hold them to a higher standard.

You mentioned a “disciplined mind.” I think other things might go along with that, like detail orientation, perfectionism, and a degree of OCD. Some of that might not be so good. Many people aren’t born with that gene, and they are not necessarily stupers. Their brains work differently. They gravitate to different jobs. They can be very capable and accomplished in their fields. I’m thinking the professor is in the wrong line of work.