It sounds awfully like I hear Astrology being defended with logic like: "If science can't prove it's wrong, it's perfectly ok to assume it's right."



"Can you suggest why minds of the quality of Plato,St.Thomas Aquinas,Newton,Goethe,Kepler,Jung and Reagan would think there's something in astrology if there isn't"

Yes..certainly. (and that is the fallacy of appeal to authority)...The amazing thing about the mind is it's ability to hold and assert mutually incompatible premises, and thus come to conclusions on one topic using reasoning that it would reject if applied to another topic.
One of the very hardest things to do is to grimly maintain the most consistent internal reasoning in the face of competing needs, concerns and wishful thinking. This is partly because careless reasoning is often embedded IN our language as we use ambiguous, equivocal or tautological terms and fail to notice that we have slipped into fallacy.
   Just consider a mother, confronted with evidence her son is implicated in a crime, refusing to believe it's true...or that "someone must have forced him...or he was temporarily insane"...etc.

Even great minds have their weaknesses....