I'm suggesting that Mars may be a more hospitable place than the moon, not more hospitable than Antarctica. Antarctica is a much easier place to survive than Mars or the moon, but the long-term benefits of establishing a permanent human presence are less. We also already have a lot of people living in Antarctica; according to wikipedia, there are about 40 year-round bases, and the population varies from about 4,000 in the summer to about 1,000 in the winter.