I don't think I can usefully attempt to answer the question, because it isn't perfectly clear to me (1) what sort of "equilibrium" you have in mind or (2) why you think I should "if this is indeed the case" expect the system to approach such an equilibrium. The linked article, consisting mostly of several pages of Macaulay, doesn't do much to make either of those things clear to me.
Would you care to be more explicit?
The point is that Asians, Irish, and Scottish Highlanders were able to overcome negative stereotypes and "microagressions", and whatever other epicycles the SJW crowd feels like inventing, towards them. Why not blacks and women? You know maybe there really are innate differences involved here.
I remember seeing a talk of the concept of privilege show up in the discussion thread on contrarian views.
Some discussion got started from "Feminism is a good thing. Privilege is real."
This is an article that presents some of those ideas in a way that might be approachable for LW.
http://curt-rice.com/quotas-microaggression-and-meritocracy/
One of the ideas I take out of this is that these issues can be examined as the result of unconscious cognitive bias. IE sexism isn't the result of any conscious thought, but can be the result as a failure mode where we don't rationality correctly in these social situations.
Of course a broad view of these issues exist, and many people have different ways of looking at these issues, but I think it would be good to focus on the case presented in this article rather than your other associations.