I disagree, I think the root of authoritarianism is fear of the “other.” The problem with the right isn’t just that they’re irrational, it’s that they see anyone “other” as either stupid or as a threat, so they stick to their own ideas dogmatically.
To me, seeing anything that isn’t “rational” as a threat is another authoritarian-like tendency. My solution to the “astrology problem” is to say, “I don’t understand this, I’m willing to learn to some degree, and if I can’t learn I can acknowledge that my lack of understanding doesn’t per se mean it’s stupid or harmful.”