I'll hazard a guess that the complaints mainly come from people in graduate programs for which the most realistic "good job" that actually uses the course subje

I'll hazard a guess that the complaints mainly come from people in graduate programs for which the most realistic "good job" that actually uses the course subject matter is a tenured teaching position. I mean, the high competition for adjunct positions seems to be evidence that many post-graduate students want to teach the subject matter that they've learned.