Well to be fair, I grant you that certain people would find those awful conditions worth it for the sake of the mission. I just think the novelty will wear off and there won't be a stream of people heading off to colonise Mars.

It doesn't make a lot of sense to jump out of this deep gravity well just to be stuck on another one at our current technology levels. Instead asteroids will be much more inviting and the technology to harvest them will combat the large existential risk from rogue asteroids that is one of main arguments for the colonisation of other planets in the first place.