But, as a pro, your job is to clearly explain what you're
doing or want to do to those who have to approve or fund it, or work with it afterwards. If you work in a back room with absolutely no contact with non-IT people and just work on the computers all day, then you don't need to be able to explain, but just about every other iT job requires interaction with non IT people, and you need to be able to explain things to get your message across and to find out what you need to know from them.