Why must people speak?

Speaking is an action all people do, for some reason.  You see I cannot seem to figure it out.  Humans have many other ways of communicating, but for some reason, we still choose to speak, out of our mouths.  These days homo sapiens can communicate with one another through many means, such as texting, Facebook, Twitter, Tumblr, and other online methods.  Then there're some physical methods to mention, such as a letter or postcard.  Most, however usually go with speaking.  For many years, I have attempted to understand why humans still choose to physically speak to each other.  I think I may have found an answer or at least a theory.  You see humans like to be lazy.  Some more than others sure, but all the same at least a little laziness is in there.  We as humans try to find an easy way out if it exists. The "easy way out scenario" is something that most would cater to.  That is also why most humans resort to talking to each other.  Talking in my simple opinion a waste of time for the most part.  I am not into speaking to others verbally in case you cannot tell.  If I am going to socialize with someone at all it is going to be the way I am writing this now, typing/writing.  My thoughts go through my head easier this way.  I was never really into socialization anyway.  I feel that life is at its best when one is alone and able to think clearly.  When one is in a group of more than one or two people, I feel thought processes get distorted.  That's why I do most of my thinking and communication alone in a room or outside with a computer of some sort.  Typing out my thoughts is a lot easier than speaking them outloud.  That is, in a nutshell why I believe the spoken word is obsolete.  Next time I will enlighten you on why I feel it is necesary to have faith in the human race, no matter what happens.