The opposite of Evolution is not Creationism. Creationism is a myth, Evolution is real.

Mythology has its place though. Joseph Campbell has made that point well.

Campbell maintains that myths help us learn certain cultural mores that are valuable.
"Thou Shalt Not Kill" is one that is an important dictum. Whether a Jesus really or physically said this or not, is irrelevant. It is still an important injunction.

Some myths help society and others are destructive. As long as we recognize myths as myths we can pick and choose accordingly.