“The truth is that such questions are open to empirical study and it is possible for social science to study them scientifically.”
Here is someone proclaiming to be a scientist, and then throwing out proclamations of ‘truth’ not backed by evidence. Goedel proved logically that any axiomatic system of information exchange can have truths that are not provable.
It’s possible human culture and society is too diverse to make claims of ‘absolute truth’ about. A statistical mechanics approach to why this might be true is telling. The more entropic states available, the more potential outcomes. That is why physics studying single atom or molecules is more ‘understandable’ than sociologists studying 10^35 if them (humans being a cloud of atoms).