Why I keep quiet..

Actions speaks louder than words. But at times we hardly concur the manner of speaking as an action speaking louder than words. It is further debilitating to hear about the power of influence. I would like to think that influential people are listened to when communicating. That's how their influence is measured.
If action are louder than words then why do people talk more than they act?
Healthy communication has been a vital tool in human evolution for ever. Why then
do saying like the one in this paragraph remains a discouragant to communication.
Quite a contradictory world I think.
I, personally have a cast in stone need to be of influence in my chosen cycle. I am not, nevertheless who would battle to be heard but have a substantial need to prove the validity of my subject matter. Other than that I keep quiet. I back off from emotional conversations.
Not necessarily that I keep my thoughts to myself but because emotional conversations have are borne in the need to be right. When I, on the other hand, open my mouth to talk I do so to influence the direction of the subject or the action that should be taken.