If the trust has been established, it remains even though the myths are shown for what they are... myths. How much stronger is the trust among believers, when the Bible is proven to be truth and fact.
Re-read my post and think about it some more.
Christian myth is the same as the Flat Earther movement from the psychological point of view. Once you are part of the group with common beliefs you cling onto that belief no matter what, that is because most people (with lesser intelligence) do not want to be wrong.
You convince yourself that what you believe is true and when you see others in your group expressing their beliefs it validates your (false) belief. Herd mentality and confirmation bias is at play here.
It is easier to abandon your false beliefs when you leave the group, and/or have good critical thinking skills.
PS. Most scientists love to be wrong, that is why you don't see too many scientists who believe in ancient myths.
If you studied Bible from a scientific standpoint, you would find that Bible isn't myth.
So, it is you who has the myths and false beliefs.