First you get the maths, then you get the money, then you get the power.
Call me a bitter ex-journo, but it's been my experience that almost no one -- NO ONE -- knows where to put apostrophes or how to spell correctly or how to write coherently -- and no one cares. I don't think writing is as valued as society as it should be -- sad!
But a typo or a poorly written paragraph probably won't bring down a company, where a math error could.
I'm going waaaaaaay out on a limb here, but math is a pretty visual thing. Ergo writing is kind of a necessity to even learn math in the first place. Math class conducted by audiobook might be a little, um, tough.