> Earth naturally warming was a.. natural event - there is no need to label it troubling or liken it to an artificially-warmed event

Natural events can still be troubling or cataclysmic.

If the Greenland ice sheet melted entirely relatively quickly, it would be extremely troubling whether it was happening for human or natural reasons.

We still have to adapt and survive any climate changes that happen, natural or not. If climate changes pose a significant risk to us, they are troubling, natural or not.