@greywarden this is absolutely excellent. I have been thinking about this overnight and this is the best post on the subject.
And OP, @ThisFluentBiscuit , you need to read that post and try and understand it. Having done the Cambridge English MA (which is what your degree sounds like, or something of that nature) you aren't as comprehensively well educated about politics and language, and the politics of language, as you think you are.
Your naive assumptions about the word "cunt" are laughable and a literal example of the gaps in your LIVED EXPERIENCE and how you have generalised those assumptions to be truths about the world. Cunt wasn't used much except in the last 20 years????! Give over. "It was rarely heard in the first 20 years of my life" 😂 My young children don't hear it much either!!
You were a child then an undergraduate reading the formal canon of literature, which had a lot of cunts in for the early modern part, then about a zillion jokes punning on the word for a few hundred years, plus things like Fanny Hill and Marquis de Sade and other well known sex texts that, you know, contain the word. Then politeness from the 17th/18th century on, and modern literature then gradually becoming more open to explicitly breaking taboos. And yes adults now being more ok with saying it in polite company.
But the word has always been there. So obviously you just haven't heard it around you much when you were young and with a certain group of people from a certain background reading a certain set of books. Now you have access to wider content plus different social groups.
Shows the danger of generalising about the world when you mean... your own experience.
Which is why stringent theoretical assessment of the socially constructed nature of concepts like help, common sense, experience... is vital in our scholarship, in our professional work, in our lives.
Basically the advice I'd give you is have a bit of bloody humility and stop assuming you know everything.