I don't have a good answer for this, but I find the notion that you can learn something in just a few hours that will profoundly impact your career intriguing.

Interpersonal skills (re: AwesomeFaic), grokking bureaucracy, learning how to learn are all career-long pursuits that define most careers (I would argue).

Tools like awk and sed are great but ultimately of marginal importance to the average developer. In fact, I haven't even found the sum of all similar efficiencies to be worth dealing with.