I think this may be true of most scientists. But the exceptions I could name are strongly active, highly influential cultural figures besides, whose pronouncements on subjects outside their fields are widely respected and well heeded. Some of these people have a political agenda: to support Left ideologies that deliberately seek to undermine traditonal concepts of sociopolitical order and, thus, the liberal state. FWIW.
I agree with you except for the widely respected part. Most scientists are quiet little nerds who run away from conflict and public notice. They will rarely appear in a popular publication or in a public setting. The lefties in the media push their favorites. So outside the sciences it will always seem like the atheists are in charge, at least until the leftist media collapses. It's just not true.
Leftists control of the media is slowly collapsing. The left no longer has dependable funding since the fall of the USSR, and polls show that high school students are more conservative than they've been in 2 generations. My glass is half full for now. ;)