How the hell do you know that they won't survive?
But exploring the unknown is part of the human psyche: throughout history explorers have failed to survive their voyages of discovery but that didn't stop others following in their boots.
No magnetic field....so no protection.
No atmosphere .
Massive radiation bombarding the planet constantly.
Any one staying on Mars would need to excercise a hell of a lot just to maintain the most basic muscle function.
"To stand would take less leg muscle; to pump blood to the brain, less heart...and what about the politics? At the outset, the first settlers would doubtless be revered as brave pioneers. Would that attitude hold as the novelty wore off? Or might Mars settlers find themselves out of sight and out of mind; resented for their need of support? Isaac Asimov anticipated as much in
The Martian Way."
Can humans live on Mars? You asked Google – here’s the answer | Ian Sample
There was a time about 4 years ago where I believed it was possible. If they survive the trip and the entry and landing....they would have to go in the knowledge and acceptance that they would not return. But unless there are massive technological advances and humans grow an exoskeleton and develop to the stage where they can put up with being in confined spaces for hundreds of days, only to move into more confined spaces with the same people on landing.. to accept that they won't see earth again. That's a massive ask.
The other thing is....wherever astronauts have gone they have been able to look towards home. To see earth large and relatively "close" by. They've been able to get home. It has been mentioned as one of the most powerful experiences they had. Earth would just be a tiny star...from Mars. It would compound the sense that there was no way back.
And the biggest question is why would we want to live on an inhospitable planet rather than fix our own?
Do you think an atmosphere can be seeded and grown in less than a few thousand years? Chris McKay estimates
100,000 years for a terraforming approach to reach a breathable atmosphere,
I've no doubt some will go as first explorers. They'll go because of their explorer spirit. But I think the reality will be catastrophic psychologically and that their existence on Mars for however short or long will be extremely difficult, riddled with disease and pain and essentially pointless bar the notoriety of being first.
Sending machinery and robots is a far better option. Robots could building a space station and start the seeding process. There is no need for any human to go until the planet is more human friendly.
That's only my opinion. But it comes from being a signed up Mars One member for a few years...and yeah I was completely sold on the idea until it was clear that we don't have the tech yet to make it work. Maybe we will have it soon but why risk human lives when robots could do a lot more until such time as the planet can actually be lived on... I mean the kind of tech that ensures an earth like gravity indoors....and the ability to get home.