Earlier quoted context omitted.
I think the real problem is, is that the humanities -- the social sciences in particular -- have proven themselves to consistently build bad models with unproven assumptions. These assumptions have been leveraged to directly influence policy (instead of, say, trying a lot of different things and seeing what works). Here's a concrete example of a paper [1] that just came out, attempting to impact COVID19 policy, from…
They make assumptions and then foreground them so the reader can understand them. What's wrong with that? Have you discovered a way of drawing conclusions without assumptions? Or do you think you can "just observe" without being guided by theory? What would a non-"fabricated" model look like?
It's like doing a car crash safety simulation and stating that the airbag provides protective force "linearly proportional to the force of impact, with alpha > 1" ... without ever measuring it or doing any calculations on why this would be the case. Would you drive in a car that was tested this way?