This follows only because academics (in relevant fields) are a strict subset of the left-wing (and generally the extreme left wing), and the relevant fields are in the middle of a reproducibility crisis largely due to their political confirmation bias. These fields are very open about their commitment to activism over objectivity (and many in these fields consider objectivity and reason to be "tools of white supremacy" or some similar nonsense). We shouldn't confuse "sociologists believe in X" with "X is true or even falsifiable".