I have moderately fallen into it, getting a BBA along with my engineering degree.
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.
"Soft skills" -- such as your presentation skills, your communication skills, client management skills, etc, are actually arguably more important. As a former consultant, I think soft skills is much more critical for your business success.
Business classes are easier than engineering classes because the "hard skills" aren't nearly as complex, but keep in mind you pick up a lot of other skills that are even more important in business settings.