That’s because it’s a major claim that has to be defended, not simply declared. On its face the claim seems absurd to me.
I work in medical research (basic science, not clinical), and I see people "cite" papers, based solely on their titles, without understanding, or likely even reading, the nuanced findings of the actual papers.
It's dangerous because it gives people, often with secondary agendas, the illusion of scientific backing when there really isn't any (or when it's far more nuanced).
I'll just note that I am still in favor of open over closed, but I think we're lagging in scientific literacy currently.