It is massively naive to think that zero of the people who are students right now will ever do sex work at some point in the future. Some of them definitely will. Even if you don’t agree that sex work is valid and honorable work (which you clearly don’t agree with) there’s no way to stop people from doing it despite how vilified or illegal it is in any society.
Given that reality, a course teaching people how to avoid the dangerous elements of a job that some of those people will eventually do, sounds like a great course. Having a sex worker who knows WTF she’s talking about teach it? That’s fucking amazing.