Each individual perceives reality in a way that is subjective, and there is much difference of opinion between individuals as to which, if any, interpretation is correct.
Culture is one influence which helps shape individual concepts of reality.
Just as there are differences of opinion between individuals, there are also differences of opinion between cultures. Political and religious wars sometimes result. My own sense of reality is subjective, and undoubtedly flawed by all the errors of thinking that tend to befall human beings. If the underlying science was very faulty, the probability of such things happening would be very low. To approach truth, critical thinking is not a tool to be lightly thrown away.