Not to mention the lack of free air (oxygen) to breathe, scarce water sources and very cold temps year-round. And how about that gravity of 38% as compared to Earth?
On Mars, we'd be the mole people, living underground. But, by all means, go and see how to best deal with these obstacles.
I should have also mentioned that what little air there is on Mars is almost all carbon dioxide (which begs the queation: Why no global warming lol) and the atmospheric pressure is more than 100 times less than on Earth.
So, even forgetting killer cosmic rays, no air, the cold temps and little water, there’ll be no free standing humans on the surface of Mars. Pressure suits of some sort required.
Do not disagree, but these young people, Generation Alpha, they don't go outside to begin with. So, in some deep irony, once this first group moves to Mars, Musk will have Marslink in place and of course local wifi, and if they want to watch anything live-on-Earth -8 minutes, there will be a fair amount of that.
As someone posted yesterday, equatorial temps can make a run at 70F, it's 'easier' to heat an underground dwelling than to cool it, as underground will seek the equilibrium of the crust/mantle.
And if probes have already found cave systems, the irony of Lascaux reborn with forced-air O2 pressurization? A vast open space with no suits and diamond windows or better ("Provide the formula for transparent aluminum, comput-ah.") to the sun, enhanced to mimic Earth-strength sunlight.
The rest of your concerns are already baked into the Martian cake, with long-term minor-gravity exposure the only one that Musk has only briefly addressed in white papers.