@Werepyre well, in Christian mythos if you heard the voice of God your head would explode because humans cannot fathom his knowledge and might. thats why there are angels, God created angels for various tasks he could not do, like talk to people. [think of it as a company, we are just temp staff, he's the CEO]
also, all myth does have roots in reality, but it is not 'Dracula came out of his castle' reality, its scientific answers with a medieval spin. for vampires there is a disease called acute intermittent porphyria in which the low iron in a persons blood causes a lot of signs associated with vampirism such as burning in sunlight, fair skin, and eating a lot of meat and blood to gain iron [historically, now there are pills and treatments]
werewolves could be either hypotrichosis where hair grows rapidly and thickly all over the body, some times on the face [see Jojo the dogfaced boy] or it was propaganda as a result of nervous people. [a la Salem] many villages in medieval Europe were by or in forested areas, at night wolves and animals would come to eat their livestock, or attack people out after dark. on the light of the full moon, they could see more, though not well. in the distance they could see a wolf, then it vanishes, a short time later, a member of the community walks by, and the rumour mill begins about 'old man Brown turning into a wolf under the light of the full moon' and such.
kitsune's would have a similar story as werewolfs would. also, if you were a man in those days and were robbed by a woman, wouldn't you prefer a tale about shape shifting magickal fox people?