The reason creationists push so hard against the teaching of evolution is that it fundamentally discredits their entire theology. It’s not just about the origin story.
If there wasn’t a literal Adam and Eve, then Adam and Eve never sinned by eating fruit from the wrong tree, and thus they never passed that sin down to all of humanity, meaning we aren’t all born with “original sin” for which we need to be forgiven and saved from being sent to hell when we die.
Nothing about Evolution disproves Adam and Eve. If an all powerful person is in the story, it's a theological and metaphysical question how Evolution and Creation fit together.
It's also kind of a boring question because there's no experiment we could run to explain how creation miracles worked. It's definitely a fountain of controversy, though.
If there wasn’t a literal Adam and Eve, then Adam and Eve never sinned by eating fruit from the wrong tree, and thus they never passed that sin down to all of humanity, meaning we aren’t all born with “original sin” for which we need to be forgiven and saved from being sent to hell when we die.