Covering how $a or $b does stuff on a PowerPoint slide
  isn't the same thing as having students write a $thing.
  Which sort of sucks when they go on the job and have to
  write a $thing!

That statement is true for many different projects in many different niches. Colleges can't possibly teach them all. If they try, then classes spend less time on CS fundamentals and employers are unhappy. If kids learn about $thing, that means less time for theory and employers are unhappy. (Not to mention that practically speaking, less time on theory means they won't be passing "top tech" interviews at all.)

"We need people who know $thing" does not imply that "colleges should teach kids $thing" is true. Is $thing important because you know it and use it, or do you know it and use it because it's important?