[wtbob]

The oceans are orders of magnitude more hospitable to mankind & human life than is Mars, and yet we have, to my knowledge, absolutely no undersea colonies. The idea that we'll colonise Mars before we colonise the oceans (a full three-quarters of the globe) is, simply, insane.

[Axsuul]

Supply & demand. There's just more people who want to colonize mars. if you're going to make the argument of living underwater, then you might as well live in the desert where it's probably even easier. Just because something is easier doesn't mean you should do it.

[yongjik]

> There's just more people who want to colonize mars.

Completing the circle of comments, this is exactly what this SV adage warns against: Don't trust customers promising to buy something once it is built, because they may not.

The "demand" on Mars colonization is essentially unproven.