Fair point and I'm not against free public education, but $15k is also a magical fantasy number to get too if you include housing/food/utilities.
To be fair, it's not like you don't have housing/food/utility costs if you choose to not go to college.
Apparently the average community college costs about $10k to graduate from, less if you're on a 2 year degree.
Cue "that's not real college" crowd, of course.
Or cut out the middle-man entirely and have the government provide college education for free.