My personal feeling is that it's always "worth it" to learn more maths. Not saying it's absolutely required, and I'm a big fan of (generally speaking) prioritizing the pragmatic / practical / hands-on over the purely theoretical. But, even within that belief system, I would say that - all things being equal - any opportunity to learn more maths is worthwhile, at least up to a certain point. Figuring out the details of the "certain point" is left as an exercise for the reader though.