It's typical fear mongering "this isn't possible because of reasons X, Y, Z". We haven't even tried it yet, or much space travel at all. It's way to soon to jump to conclusions.
It's fascinating that you and nick49488171 both characterize this article in ways that no reasonable person would ("pearl clutching", "fear mongering") and have nothing substantive to say about the points made at all.
“As far as human space travel goes, it’s probably best that it stays in the realm of science fiction, at least for the foreseeable future.”
And no arguments for that conclusion? C’mon: radiation, the effects of microgravity on human bodies, none of which we have good solutions for…yet. The author argues that we don’t have good solutions, and probably won’t within their lifetime. If you’ve got counter-arguments, let’s hear them, but calling the TFA’s sound arguments “pearl clutching” isn’t productive.
As for your hazards Microgravity can be counteracted with a centrifugal living environment.
Radiation can not be mitigated effectively yet other than throwing mass at the problem. But if someone wants to launch enough mass that's on them.
Don’t need one, it’s an opinion piece, with plenty of facts to back it up. You’ve proposed solutions that don’t yet exist. When those solutions are viable, maybe it’s not such a bad idea. But at the moment it would appear that such a journey has low odds of ending well. If Musk wants to burn cash, and has willing participants, go for it. But with my tax dollars? Yeah, you’re going to have to do better than a lick, prayer, and a hearty “good luck!”