This is a good point, but I think a minor one in the context of the post.

The larger and more important issue is the utter contempt for feminism (which, at its best simply strives to have women be treated no worse than men), and the contempt for "social justice people" (ie. people who actually care about justice for everyone).

And this contempt came from someone who feminists and "social justice people" were concerned with helping. Instead of any kind of constructive or even thoughtful comment on the issue, the author's friend simply contemptuously dismissed her and everyone who cares about any of these issues.

That's the larger problem. Contemptuous dismissal of people who are actually interested and motivated to help move society forward.