I agree with you. However, it’s worthwhile also noting these represent a very small proportion of all jobs in software development.
I'm interested in being an instructor, but not sure I would have anything useful to add. If you've read my blog [1], do you think I would?
If you haven't read it, feel free to ignore this.
Edit: I was specifically thinking about a course on fuzzing.
The thing is that web development has seen such a boom which has seemingly dwarfed everything else in its wake.