They are a part of nature; as are, in fact, pandemics. But consider -- the tide is small, right? Yet its impact on some places is huge, simply because of the geography (think of tidal flats, or the Bay of Fundy). Same thing for a small change in temperature. And that's just the obvious.
The more insidious changes are the ones that you don't think about, because "they've always been there." Things like the Antarctic ice sheet. No, it's not all going to melt next year, or even by 2050. But in parts, once some of it starts to melt, some of the ice sheets will disappear -- the sheets on land, not the shelves that are already in the water. That's why all the worry about the Thwaites glacier.
Kind of like a glass of water -- once you start tipping it, once it reaches a certain point, it's going over unless you catch it, and even then some water is spilled. We don't have hold of this glass, and we're tipping it.
Wendy P.