Why does a modern person need to be able to communicate with different people? what can the lack of this skill lead to?

Why does a modern person need to be able to communicate with different people? what can the lack of this skill lead to? What issues that you and your friends discuss most often lead to controversy? Who is easier for you to communicate with: parents, peers, teachers? Why?

The modern person constantly has to be in different spheres. If earlier, it was possible to confine ourselves to a narrow family circle, now we constantly meet new people. At school, at the institute, at work, in a store, hospital, etc. If a person does not know how to communicate, then going to the hairdresser can become a problem for him. He will not be able to explain what he wants, and also will not be able to object if they do not what was required. Most often controversial issues are related to future adult life. Everyone has their own opinion on this topic. It is best to communicate with peers, as it is easier to find topics of conversation with them.