It is important to understand and minimize them. Humans can listen at twice the speed the average person speaks. People think even faster than they can listen. Listeners' minds wander while waiting for the message to end or speed ahead anticipating the speaker. What someone says often ignites ideas in a listener's minds sending them off on an unrelated stream of imagination.
Many speakers amble or take too long to get to the point.
If the subject is highly emotional, the speaker may detour around the real issue. Our lives are full of distractions and interruptions. You may have the knowledge and skills but your attitude might vary with the setting. Talking over the other person, often becoming louder to do it. Advising - You solve the other person's problem when he only wanted to share an experience with you.