It’s also not as if Mars is some kind of lynchpin in a future of humanity in space, and if you focus too much on one target you’re blinded to other options. Keep more of an open mind and be a little less cavalier about killing people and things might turn out better than you’d expect. At least, better than the “build a mountain of smart-people corpses until the problems dissolve” approach can hope to achieve.
Or think of it this way; what you’re saying is equivalent to saying that the problem of humans not being able to fly can be solved by taking a bunch of smart people up in airplanes and pushing them out without parachutes.
We should definitely talk one day about radiation, funding, a mass estimation for the equipment, how much it will cost to develop it -no one is selling minifactories for Mars today- and the business model of the whole thing, because if no one is paying for it, it won't even start to happen.
I'd love to see people taking this seriously for once and stop visualizing only a successful outcome there's no reason to expect with the facts we have (or don't) as of today.