You bring up an interesting point, to me.
What Conservatives have to contend with, I believe, is things like elementary school math teaches things like, “2 + 2 = 4”, which are important to learn. Only later in life does the student learn that, in the real world, “2” is rarely just 2.
How people assimilate this is what the Left capitalizes on. Most can probably accept that mathematics is theoretical. A great many, however, experience what another poster identified as “cognitive dissonance” and, when they learn that sometimes “2” is not just 2, they decide that it never is, and that Mathematics must just be the White Patriarchy, or some such nonesense.
For people who are too lazy or too stupid to learn mathematics, accepting that mathematics has practical value and utility would force them to admit that their own laziness or stupidity contributes to their inferior economic status. Instead, many accuse “the man” of using mathematics as a shibboleth, a meaningless test, to discriminate against them.
Similarly good, clear writing and vocal expression using standard English facilitates communication which is essential to smooth function of a society. If everyone speaks his or her own language and uses his or her syntax and vocabulary, Babel ensues. Rather than accept this, they attack standard English as another meaningless shibboleth.
Try designing a cellphone or a cellphone network using Ebonic math or writing technical manuals in Ebonics.