The first example that article gives is:
UCB business is poor example here. Students are not admitted to the major until junior year after a competitive admission process. Pre-business students taking the lower level prerequisite courses (some of which can be exempted with AP credit and most of which are shared with students of other majors) are unlikely to be organizing themselves into cohorts to take them together (and may look at each other as competitors more than people to work with).
Odd that the author leaves out a sensible way of determining what the proper placement should be if the college allows AP credit to skip a frosh level course that is a prerequisite to some other course that you will take: Try the college’s old final exams of the frosh level course that can be skipped. If they are easy, skip it. If they are extremely difficult, retake it. If they are mostly easy with a few difficult topics, consider reviewing just those parts before skipping it.
Skipping a lower level course that you know well effectively gives you the opportunity to take a free elective (possibly later, when you are able to take higher level courses in your major). That can be a better use of your time and tuition in college.