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Yeah, but it's in your text/comment. The logical thing is that it makes 0 sense. Columbus to not take the real circumference makes 0 sense. Let's go to Mars, start a civilization there. It'll be a lot of change for us humans. And only if you live somewhere you can really solve problems. Maybe it's a good plan against a nuclear war, whatever.

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Columbus was just wrong, he was not motivated by some higher goal.

And no, it's not a good plan against a nuclear war, Mars is far far far less hospitable than the Earth would be if we launched all of the nuclear weapons we have today. It's far more radioactive, dusty, cold, toxic, and everything.

The tech we developed for Mars can become useful for the Earth of tomorrow, once World War III finishes.

Let's first build a self-sustaining mega-city in the Sahara desert, or in the Antarctic, and then we can use what we learn doing this to start thinking about a colony on Mars. Building new self-sustaining mega-cities on Earth has obvious direct advantages, and it is a reasonable first step and case study for doing so on another planet.

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