Why geeks need to know how to write?

We have entered a society in which science are predominantly embedded in various aspects of our life, ranging from a scissor to a smart phone. We have been unprecedentedly depend on technology ever before, which gives rise to the golden era of geeks: no matter it is a glitch of your home appliances or your forever crashing python program, geeks are always prepared with the complete knowledge base to save your life.

Geeks only spend their time on the very most practical skills among the pool of human knowledge(they are born to solve technical issues after all). It seems that they should be immune to all form of arts---literature, music, language, speech, etc., and sometimes not even the basic writing skill(they probably rarely have the mood to lay their bottom to a chair in their high school English class, and thus barely pass the literacy test)

Is this the mere outcome of natural selection and human functionality specialization? OF COURSE NOT!

Writing is actually a universal skill which lays the foundation of academic communication across a broad range of subjects, an idea is not substantiated until it is articulated by words, and preferably on a piece of paper due to its considerably better portability than voice. It would make no sense if an idea is trapped in one's owe mind instead of spreading it to the world and make a difference, no matter how brilliant this idea is.

For instance, in Python, a well written doc-string or comment will greatly facilitates  people to comprehend on your codes.  The competency of a programmer is never only a matter of how sophisticated a program he/she can writes, but most importantly, how easy your boss/clients can understand it.