They may be unimportant for your survival, but they are necessary to fulfill higher needs for self-expression and social interaction. Person A and person B can not easily communicate what is outside their common frame of reference - outside their instinct, common knowledge and common areas of belief. Beliefs and knowledge that are not shared between the two people A and B, need to be established with interactive communication and this is time consuming and requires a measure of willingness and tolerance. To be effective, global communication between all humans at the most basic level has to rely on the instinct area and the field of common knowledge that unites all humans. Communication positions bodies in space and time.
Communication is the most crucial element of our civilization.
Without communication everything would break down into random activity. Our civilization today has still too much useless random activity because of poor communication between individuals and groups. Improved communication will focus activity to increase benefits. Better communication tools and techniques have to be created to enhance human communication. Written communication will evolve from words to models.