Of course your (and your vaunted ID doc's) ignorance on Dr. Risch's HCQ+ research and the effectiveness of HCQ+ will always be front and center, but this is in the ballpark with PJ Media in this instance.
They are reporting directly on a study done by two respected universities. A simple Google search confirms other studies showing the same thing.
The reason is obvious. Liberalism is emotion-based, so therefore emotional health plays a much larger role among the left. And when you're constantly thinking and being told the world is racist, bigoted, unfair, etc., of course emotion-based individuals' mental health will take a greater hit.