Does it make sense to consider cultural factors? Regardless of the issue, if your opinion is at odds with the dominant culture, it seems reasonable to believe you have actual reasons for defying the common consensus. Only the dominant opinion can be taken for granted. Suppose you are the only conservative in a family of liberals. Liberalism is the default position. So if you are going to opine within hat context, prudence suggests you should be prepared to justify your stance.
On a forum devoted to atheism, atheism is the default position. Thus, no justification is needed. However in the larger USA community, where religious belief is the norm, the roles are reversed.
On a forum devoted to atheism, atheism is the default position. Thus, no justification is needed. However in the larger USA community, where religious belief is the norm, the roles are reversed.