Nonreligious people are the largest spiritual group in the US. Why don't we hear more about them?

Nonreligious people are the largest spiritual group in the US. Why don't we hear more about them?

When the Public Religion Research Institute (PRRI) released its most recent Census of American Religion, its survey data on U.S. spiritual beliefs identified nine types of Christians (including five types of Protestants and three types of Catholics). However, when it came to religiously unaffiliated