I think it is just basic human nature to desire to be right all the time. After all, these are your thoughts and ideas and feeling that those views are incorrect makes people feel flawed in some way. Some people have the humility to accept imperfection and some people have all manners of defending themselves from this conclusion.

I think the majority of people have been conditioned to think that being incorrect is bad in someway instead of finding it as an opportunity to improve themselves.