And if they're not, they should be.
One of the problems with the so-called mainstream religions (in particular Christianity) is that, over the centuries, many different interpretations have evolved with people picking and choosing what they want to believe.
As far as I'm concerned, if your holy book is the inspired (and infallible) word of god, then you must believe it word-for-word; you can't just pick and choose what to believe because it conflicts with some contemporary viewpoint or other.
Your holy books were written thousands of years ago by (relatively primitive) people trying to make sense of their world and its place in the cosmos. They believed (among other things) that humans were a separate "creation", that the earth was flat and at the centre of everything.
What we have learned in just the last hundred years shows us what those ancient texts mostly are: superstitious fairy stories.