The study's authors also found that large numbers of students didn't enroll in courses requiring substantial work. In a typical semester, a third of students took no courses with more than 40 pages of reading per week. Half didn't take a single course in which they wrote more than 20 pages over the semester.
Not to say "I told you so" to some faculty and administrators at a boarding school where I was once employed, but I saw this coming fifteen years ago. When I attempted to address it, I was informed that my perspective was "dated" and "disharmonious to contemporary thought". I would suggest that the inability to think critically would create something more socially alarming than disharmony.