Just the euphemism "unprepared" exposes the college diploma fraud that is sold to so many American kids and families. As I have asserted many times, if you can't handle calculus, statistics, college physics, Econ, Plato, and Thomas Aquinus, you do not belong in a serious 4-year college.
There are immense other learning opportunities in the US for anybody who wants them, for motivated scholars. Public libraries, for one example. They do not close at 5 pm. Useful community colleges have sprung up all over America to provide some of the basic and remedial education that was not done in government high schools, and to teach practical skills that used to be learned in apprenticeships or on the job.
"Unprepared" is a euphemism for unmotivated, uninterested, or unable for personality or intelligence reasons. Not everybody can play in the NFL either.
Remember the shocking reality that half of Americans have below-average IQs. College curricula have been aimed at well-above average IQ and well-above average curiosity and self-motivation levels. Some "experts" opine that only 5% of a population are really able and interested in the demands of traditional and rigorous higher ed. I'm willing to admit that, of that 5-10%, only about half would be motivated to self-educate without the structure of a school. That's simple lazy human nature.
Were I (God forbid) a college admissions officer, one thing I would care about is what the applicant learned outside of school on their own initiative. As I have often said, learning is not something that is delivered, it is something that is taken. You can lead a horse to water, etc. Even the "worst" schools, whatever that means, offer huge opportunities for anyone who wants them. Teachers want nothing more than motivated, capable, and respectful kids, and will respond to them. Yes, even unionized teachers.
People can dumb higher ed down all they want to fill seats, collect tuition, etc., but it doesn't mean a thing anymore.
Anyway, this prof gives a dismaying report from the front lines of higher ed today.
Somebody commented recently that we should be grateful that our founding fathers were all home-schooled.