Having had 2 careers, one in the laboratory/chemical engineering and the other in a senior commonwealth public service position, I can assure you that without a broad based "English" education, and that is not just being taught to use good grammar, but in achieving a good knowledge of the depth of English Literature, you will not be able to communicate effectively.
A wide exposure to English Literature, from DeFoe, Smollet and Fielding (the genesis of the English Novel) to today's authors, gives you an ability to frame arguements and choose sentence stuctures to target your audience with your proposals and achieve your aims.
Continuing your arguement with my emphasis ....those of us who do science-based subjects must be able to communicate clearly and cogently if they wish their scientific work to achieve the desired result. Brilliant research put forward in a badly structured and poorly put together document will fail to be given the due it is worth.
In my case, a double major in Applied Math, I did sub-majors in 4 units of Cartography (the need to display data in a meaningful way), and the 4 basic units of Education (to better collate my thoughts and present them in different ways), plus English Lit I for writing/composition skills.