Communication is the process of information sharing between two persons. Communication in relationships is very vital as it enables the parties involved to air out their views.
Relationships where communication is absent results in issues that ought not to arise. Which means both parties will be assuming what the other person wants or likes or feels. Which is wrong.
When we communicate, our relationships will be less problematic. Of course disagreements will come as we are but humans.
Sometimes, we may feel that if we do say certain things, it may hurt the feelings of others but not saying them might also result in bigger problems.
When we communicate with people, we get to understand them and thus know how to approach them on things that we may or may not be comfortable with.
Communication thus provides a clear air for people to work together.
You are absolutely so right about that, communication is indeed so important for any relationship to go well.