Except that most sites don't care about providing decent clues (correct mark-up, ARIA attributes, etc) for javascript interactions, so that's also a poor argument.
How many web developers looking up CSS reference material are using screen readers though?
It's OK to develop for your target audience, right?
I admit I'm atypical here, but I do all my development work in emacs, and it's nice to have reference material that can also be accessed through emacs.