Since my teens that I’m acquainted with taoism and Chinese ancient culture so glad you also know about such personages. By the way they might have become deities for the masses which is about exoteric taoism and confucianism, meaning a reduced view compared to the esoteric dimension of both branches… Etc.
Now as for Buddha Dhamma I can’t blindly believe in something that I didn’t live personally, like Gotama lived. And now you’ll say ” but if you trust that the Buddha had a direct acquaintance of rebirth through Insight Meditation, then why don’t you “believe” in rebirth ?” Well to this question I already answered a few times… Did you read all my posts? It’s not that I don’t believe at all…
P.s.- “Direct acquaintance” it’s an extreme simplification of course for it certainly is the kind of transcendent experience difficult to explain verbally, even in Pâli…?