I would argue that computer science is a bad example because blue collar programming, systems administration, etc. largely doesn't require a college education a

I would argue that computer science is a bad example because blue collar programming, systems administration, etc. largely doesn't require a college education at all, for the reasons you mentioned. Short of research and study concerning the mathematical limits of computers, hardware, and software, much of the computer work that is largely better served by a period of work experience than that same period in university. The point that I was (and doing a poor job of) trying to make is that concepts that will be constantly reviewed anyway probably won't benefit from an inordinate amount of time being dedicated to them, as the "working memory, long-term memory" issue mentioned in the article doesn't fit such situations.