Putting humanity on a second planet is about creating a redundancy in case something happens to the earth. That redundancy is designed to protect against rare

Putting humanity on a second planet is about creating a redundancy in case something happens to the earth. That redundancy is designed to protect against rare events on that might well be 100,000 years away. Going to mars to "save the human race" isn't a path anyone is proposing as an alternative to addressing climate change. That's a challenge we face across the next 10-200 years. Going to mars to "save the human race" is about ensuring that, if a planet-scale disaster strikes the earth in 10,000 years the human experiment continues on. They're two different challenges that we face, and I see no reason why we can't address both.