The best reason not to take Genesis literally is primarily due to it being unsupported by science.

Now for Christians ,it's important to know that all scientific discovery has a spiritual component.

The earth orbiting the sun ,rather than the other way around is still inspiring and still testifies to God's creative powers.

Genesis was never meant to be a factual account of creation but rather a statement of belief to compete with the other creation stories in the area .. The same kind of beliefs found in various governments stating what they generally believe and advocate.

Like the words of the cons***ution .. Life liberty pursuit of happiness and so on.. blah blah