Most of us just want to fit in, and believe what everybody believes.
Coming to your beliefs this way is not actually intelligent. We don’t do it consciously. It’s just tribalism or herding instinct or whatever.
So if everybody agrees with you then that’s a pretty good sign that you are wrong.
Being contrarian just for the sake of being contrarian doesn’t make one interesting
Edit: I gotta look at usernames before I comment
A contrarian isn’t one who always objects — that’s a confirmist of a different sort. A contrarian reasons independently, from the ground up, and resists pressure to conform.