[mikeash]

"Tragic" relates to humans, not the universe. Yes, humans are elated that cyanobacteria changed the face of the Earth, and would be quite sad if a similar event happened now that wiped out humanity.

This nonsense about "the universe doesn't care about our climate" has got to stop. No, it doesn't, but humans also don't care about what the universe cares about.

If you want to take such a large view that the fate of people doesn't matter, then go for it, but don't be puzzled when you end up in a tiny minority by doing so.