Why do you think it would be included? In public discussion the concern is effects on human survival and economic/geopolitical displacement due to human-caused climate change. Nonhuman-caused climate change is largely out of our control, but I suppose we could study cooling periods to come up with new ways to combat it, versus just reducing our own greenhouse gas emissions.
One of the things I almost never see mentioned in the various climate debates is the observation that Earth is historically on the cooler side and is rising from that very low base.
The planet has historically gone through multiple cycles of not having polar ice caps and then having them again, etc. Over millions of years. There's been a really long-term feedback loop there.
I'm not a climate scientist by any stretch, but I just find that general omission in public discussions around it to be interesting.
https://www.climate.gov/news-features/climate-qa/whats-hottest-earths-ever-been

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