I teach one of the most essential classes offered to students at my university. It's not popular - not at all. It's filled because it's required, not because people want to take it. I never had to take a course like this when I was an undergrad - and I paid dearly for that in the workplace. It's one of the most stressful courses a student can take. If it had been mandatory when I was in college, I would have done everything in my power to get out of it. But back then, in my liberal arts college, it was not even offered.