Exactly. Who is going to want to live underground in a freezing wasteland for the rest of their lives after the initial novelty of 'being on Mars' wears off?

Exactly. Who is going to want to live underground in a freezing wasteland for the rest of their lives after the initial novelty of 'being on Mars' wears off? Nobody even does that here on Earth, so why would they want to do it on Mars? Floating around in aerostats on the cloud tops of Venus where it's roughly room temperature at 1 atm on the other hand... or living on the Moon where you can at least communicate with Earth in roughly real-time and are only 3 days away...