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.
Sometimes most people are right. Sometimes most people are wrong. Come to your own conclusions as independently as possible from what other people think. It’s just as much a fallacy to assume the majority of people are wrong as to assume they are right.
And some things aren’t even objectively true or false, they are just personal preferences or morals.
But independent thinking contradicts my 1000000 years of genetically programmed tribal instinct. You’re asking a lot.