this mindset is rooted in what I like to call positive objectivist ethics; Rand had some good ideas but went wrong in their application. the single most valuable insight of hers, IMO, was that there is no such thing as altruism; humans do everything with self-interest in mind
if instead of pretending otherwise, and telling ourselves (and others) that we are motivated by high-minded selfless considerations, we admit that, no, we are driven by enlightened self-interest, we can more honestly structure our priorities and life plans