One early scripted ep had the Stevenses and the Kravitzes gathering around a table. Samantha made a phantom apparition appear. It was not in any way a real spook that could think like her. Just something she invented.

Greek Mythology had fake, unreal pagan gods like Zeus and Apollo. Not that much science was in the Illiad and a shred of historical accuracy (the Trojan War being a real event though very different than shown in the Illiad) was not enough to make anybody even slightly wonder if Zeus, Apollo, and the other gods on Mt. Olympus were real. They were not. They were as fake as the phantom Samantha conjures (actually totally invents) on Bewitched.

The Holy Bible OTOH has hordes of science in it (round Earth hanging on nothing, jet streams, man from soil, head causing body to grow, age of civilization,etc). It is also crammed right to the gram with giant amounts of utter accurate history. All reason enough to realize God is real and so is Jesus.

The Bible actually mentions Zeus if I remember right during Paul's travels. It talks of false Zeus going out of being worshiped in exchange for true one God and Jesus. The Bible leaves no possibility that Zeus, Apollo and others like them were semi-deities and grandchildren of the true God (or something very much like that). Bible alone gets worship. Not Greek mythology.

(Point in short: analogy. In real life like on 'Bewitched' there is a real supernatural being and a fake one.)