I mean, that's at least in part because you can't on a legal level. There's no private property rights and any of the Antarctic Treaty participants has the right to enter and inspect any installation on the continent. It's a set of research stations, not a colony.

Siberia has other problems similar to Mars. Water is frozen, so you have to melt it (as on Mars). Growing seasons are short (similar to the sunlight issue, which we've solved on Earth with grow lights...).

Focusing on the "Mars has more things to solve" thing continues to ignore the point.