Dear @alvinauh
It's me again :)
In certain fields of studies, some professors may have their own bias towards a particular topic.
It reminded me of some experience I went through during my uni. I studied Marketing and Management and one of our topics was: quality norms according to ISO 9001
At that time I was already working as a certified ISO 9001 auditor and I thought that I may learn something from the teacher. All I've learned was ... useless rubbish. My experience meant nothing.
I never got PhD and I'm glad I never wasted more time studying. One year of running my own business tought me more than everything I've learned during my few years at university.
cheers, Piotr
That's very true especially if you're in the business field, my field unfortunately requires me to have a "Dr" in front of my name, superficial, but nonetheless a requirement.
Good thing you went through the university of life!