I’ve tried to explain this to people, and they often default back to “well the planets have a gravitational influence on us”.
But if that was the basis for astrology, all they would be concerned with was where the moon was, since the moon’s gravitational influence is greater than all the planets combined. Yet they never care about that.
It’s all silly though, since astrology was invented when nobody knew anything about radiation, or gravity. It was a “mystical” science back then, and it still is just mysticism.
But some people who believe in it may allow the power of suggestion to actually influence outcomes?