Rockwell envisions the libertarian philosophy as being the non-aggression principle, Lockean property rights, and nothing more.
Any concern for social and cultural issues beyond this is merely a person’s preferences that have nothing to do with their libertarianism. “Libertarians are of course free to concern themselves with issues like feminism and egalitarianism. But their interest in those issues has nothing to do with, and is not required by or a necessary feature of, their libertarianism.” I don’t believe this is the case. My aligning myself with the ideas of feminism, anti-racism, gay and trans liberation, and worker empowerment is an outgrowth of my libertarianism. I am committed to those principles for the same reasons that I am committed to anti-statism.
Rothbard’s argument shows how liberty is needed for each person to find their own purpose and achieve their own good. This goes beyond the actions of the state. Repressive cultural norms and domineering social customs also prevent people from flourishing. They, too, lessen people’s liberty. A black person can’t flourish if he lives in a staunchly racist community with employers and businesses who refuse him service. They wouldn’t be violating his rights, but they would certainly be diminishing his ability to achieve his own good. He would hardly be considered free in such an oppressive society.