Christ making statements about Creation

If Jesus knew that several parts of the old testament were factually incorrect, why didn't he bother to tell anyone? If the Bible is supposed to be a guide to a persons life, it seems vitally important that he/she knows what in the bible actually happened and what is simply a moral fictional story. If Jesus knew these events were false, it would seem extremely odd on his part to not spread this news to everyone else. Had he simply slipped a few paragraph into the Bible at one point or another explained what is literally true and what is not, us humans could have avoided centuries of ongoing strife between science and religion.