"I have found everything could be picked up in a few weeks."

yes, business courses are really that easy

i took accounting course back then, the first couple weeks it didn't make sense (too simple). i thought a better way (aka ABC (activity based accounting)) which was covered weeks later

i sat on mba course later and most 'analysis' are too simplistic, mostly straight lines (remember 'beta' ?). complete waste of time.

i feel that business in general is easy and not much to learn so schools just teach everything for the sake of teaching.

out of the 1000 pages in many business textbooks, maybe only 100 pages are useful.