But learning if those climate changes can/could be prevented is valuable lessons. If an asteroid impacted caused the changes, preventing an asteroid strike is close to possible now. Super volcano eruption would be much less avoidable. Maybe in a few hundred years someone can look back to see if the mechanization of man made a preventable difference. It just might not be man that is doing the looking.
The Whole History of the Earth and Life - https://m.youtube.com/watch?v=SkeNMoDlHUU
It's really mind boggling how many times earth has seen a mass extinction, followed by life appearing again.