Many years ago, I read about a court decision which declared secular humanism to be a religion. This hasn't stopped it from being taught in public schools.
The court has it wrong. Not all evolution is about the origin of things and none of the supported theories are meant to identify the unrecorded data. The theory (the repeatedly testable scientific model) of evolution has two basic premises:
1. Relationships exist
2. Things interact with each other, causing mutual change
These are FACTS as far as our mortal bodies can be concerned. If religious creation stories are absolute truth, then they are of no use to us whatsoever. Absolute truth is of no concern to mortals, leave it be. That illusion of the way the world seems to us is of more value.
Why should secular humanism (evolution) be taught in schools instead of religion? Evolution builds bridges.