I'd be more impressed with Mars pessimists if they'd admit that it's just not really the kind of thing that interests them rather than insisting that it's going to be a terrible nightmare for anyone.

The GP said the novelty will wear off in one hour, tops. Sorry, to some people, that's a ridiculous statement. Pointing out that it would probably last longer than that is not insisting that it's going to be one big breathless adventure.

People have lived in solitude and isolation before. People have lived on the space station for extended periods of time. There are people that don't really care to come home to their comfortable home and family every night. I'm pretty sure there are some people who would not be miserable living on Mars.