I see Mars as a backup
As soon as we’ll have a reliable transportation corridor to Mars, some people will carry out a heroic feat by moving there.
I won’t be one of those people. I’ll stay on Earth, because it will continue to be, for decades, if not for centuries, the best place for humans to live.
I see settlements on Mars and encapsulated cities in space as useful backups to have lest Earth arrive at the impermissible brink of annihilation.