I do agree.
Able to follow your reasoning & that gender definition-ism isn't philosophy.
Well done.. together witnessing that those academics, right now, have
no other search conclusion.
So yes the philosophy you describe is trying to find problems where there are none
within the probable parameters, a virtual impossibility.
I too studied sociology many years ago intensively ; & was always puzzled that at unknown
stages I would be required to go back over work completed to rethink what I had understood
& learned connection wise. This led me on to see if the same odd reset happened in another
very similar social science - psychology.
And it did (I was at university at the time & was marked down when I gave a different conclusion
to apparently what-was-to-be-learned..).
This made me crucially think that there was something wrong with the teaching I & others were
getting in a social science...& to cut a long story short I found the reason to be that the philosophy
behind the course structure -in particular the COURSE AIM- was faulty. And it was the difference
between what is known as the search method called "objective" and in the first instance what had
already been identified as "bad philosophy"...the known bad stuff of general philosophy called
relative-ism, & subjective-ism and newly discovered historicism.
Your brief description in your Question suggests that the type of philosophy used in your example
was one of "historicism" - an easily missable mistake in use with junctions throughout which are
based on historical, unreliable deductions usually ; where such can be well "masked" & are not
easily prominent where they occur. It takes some further work to unearth these historicist
mistakes when & where they occur, & as I have found this can takes much time & effort in
trying to show others exactly the fault or faults in some previous unsuspected work.
modern objective philosophy (+ training within the History-of-Ideas,
for info see Conjectures & Refutations by KR Popper + my open
work user activity where I explained my experience of University H.o.I.)