If I move to Mars and my only contact with Earth is via Twitter over Starlink in Elon’s Hyperverse, then I think I’ll take my chances with the climate catastrophe on Earth. Death would be more merciful.
If we could build a "bubbled" city on Mars, we could do it on Earth far more cheaply, it seems.
I'm not sure if that is the same case if a meteor strikes.
And it's easier to ignore people on another planet. Empathy does not survive distance, and on Earth even a wall is enough to remove empathy.