Nothing that humans will ever, ever do to Earth will make it less hospitable than Mars! Not a nuclear war, not anything. You want to build a remote colony? The bottom of the ocean and Antarctica are warmer and safer than Mars.
The only problem with the bottom of the ocean is the colonists might be able to escape! While this is impossible on Mars.
Nothing that humans will ever, ever do to Earth will make it less hospitable than Mars! Not a nuclear war, not anything. You want to build a remote colony? The bottom of the ocean and Antarctica are warmer and safer than Mars.
The only problem with the bottom of the ocean is the colonists might be able to escape! While this is impossible on Mars.
This is 99% correct.
Unless we runaway climate change ourselves into becoming a new venus, but even then we'd have the gravity.