Technically, it should be "It's not as if language and written communication are unimportant." If we were to nitpick style, we'd say that the double negative i

Technically, it should be "It's not as if language and written communication are unimportant." If we were to nitpick style, we'd say that the double negative is unnecessary, and that "It's..." construction is flabby. So we'd reduce the sentence further to "Language and written communication are important." Debatably, even this statement is reducible to "Written communication is important." From there, we could even cut down to "Communication is important," assuming that "written" is redundant in context. Not trying to be cute; just illustrating a point. You could argue that I'm reducing too far and slicing away some nuance. Nevertheless, a primary goal in writing is to make a point as succinctly as possible. This is doubly true in short-form writing, such as in resumes and cover letters.