It's no different than the arguments made here to not 'kill' the economy for the sake of the deaths COVID causes. Their mantra is "the cure is worse than the disease."
And that's because they're willing to accept what would be -- without mitigation -- more than a million deaths in the U.S. They're willing to accept overwhelmed healthcare facilities where some people die because there aren't enough intensive care units and respirators to go around (and those with critical health issues for other reasons, for example, a heart attack, don't survive because all the ICUs are full).
So, he's right in that you can just let it run it's course and eventually we'll be immune to it. And by "we," they mean the survivors ignoring all those who died. So, don't flatten the curve and let it peak beyond our healthcare's system to possible save many of the infected.
And now, the ad hominem: But what do you expect from a website that traffics in conspiracies?