Education of a question

I sometimes think that people talk just to hear themselves. This isn't a bad thing. The just don't let themselves hear what they are saying. We feel we need verification, agreement that what we say is right. We have become conditioned to feel that an answer is only right when someone else tells us that it is. Where did we lose the ability to be wrong? Is it such a bad thing? If we were all right all the time, who would we have to argue against?