Adding Arts to STEM is gaining a little momentum according to an article in EdWeek - STEAM: Experts Make Case for Adding Arts to STEM . The theory is that you need to the arts for context, for design etc. and they are correct. Coincidentally you also need English to succeed in college and in STEM subjects because if you can't read and write, you can't become a math, science or engineering expert.
So you basically need a solid, well rounded education to succeed in STEM. Who'd a thunk it.