It's more like "the Holy Ghost shall teach you in the same hour what you must say".
But that doesn't match your faith. Catholicism is all about process. No one is saved in a moment permanently, the sacraments must be partaken of throughout life (or else), etc. AND, one must remain smart in thought and obedience to the Church (or else).
I still think it's Darwinian because your side says that God never interferes with man's free will. That leaves man to his own inner devices to come up with the smarts to make good choices. You'll say that God leaves bread crumbs as a guide and so forth, but the individual ultimately uses his inner independent mind to choose wisely or not. If it's only human decision based, then only the smartest will survive.
True, but man is not alone: the very fact of the Incarnation proves that. The leadership of the Holy Ghost is something promised to the Church and her continuing existence proves it, just like the state of Protestant disarray proves its absence.