That’s a fair point. For my own part, I can accept that the earth is old. I can accept that humans and animals share a common ancestor. I can accept that Adam and Eve weren’t the only people around at the time. But personally I find that suggesting that they didn’t even exist at all is taking things a bit too far. I know I’ve talked about there being an element of passing the buck in the doctrine of original sin, but when I read Romans 5 I find I still need to assume that there was an actual historical Fall at some time in Earth’s history in order to understand God’s plan of salvation.
It’s just unfortunate that people such as Kelli conflate a historical Adam with all the young earth nonsense, and assume that just because we don’t acknowledge that Noah had sauropod dinosaurs on board the Ark, that somehow means we believe there’s no such thing as sin. But nothing could be further from the truth.