Better that than guessing and having faith, though. I think they're just saying that (I haven't verified this) opinions associated with "left" in the USA¹ are u

Better that than guessing and having faith, though. I think they're just saying that (I haven't verified this) opinions associated with "left" in the USA¹ are usually more in line with experimental results than religious faith as compared to opinions associated with the "right" wing. ¹ adding a cultural marker here because it's not universal. In NL, this would correspond to "center" if I'm understanding these general labels correctly.