Thumbs up for telling people they need to know some math. Even if you're not planning to work in the specialized areas that are mentioned in the article, it wouldn't hurt to be more comfortable with math than most developers are, because you may need to step in and help somebody in one of those areas, and (for me, at least), learning stuff like that on short notice is really hard.
You don't really need to know 3D math unless you're working on graphics. It helps. But you don't /need/ it.
Everybody has to choose things to learn and not learn, but my experience has been that putting math in the "not learn" category can make your life/career more difficult in some job markets. If most game devs decide they don't need to know math, that's just more opportunity for me, so I'm not too bent out of shape about it. :)