/lit/ - Literature

My English professor asked that I change my reference to "the origin of man" in my blog post to "the origin of human beings" since the former is gendered/sexist language.
I can see how "the origin of man" may seem non-inclusive, but "the origin of human beings" wrecks the parallel structure of the sentence.
Also, since I am biologically male, it seems reasonable that my writing might include words with masculine connotation. Although "the origin of man" and "the origin of human beings" refer to the same idea, "the origin of man" is strictly more masculine.
I would concede to his suggestion if this were an essay, but this was a blog post. Should I bite the bullet and make the change, or should I tell him to piss off?