>Everything else is weakly correlational for vitamin D.

All cause mortality is correlational for vitamin D. Various disease outbreaks (common cold, etc) and severity are correlational for vitamin D. etc We even know by which mechanisms so it's not like this is far fetched stuff where we're overlooking things.

This kind of stuff slaps you in the face if you live in the northern half of europe. To then think us now spending the majority of our waking hours indoors and the prevalence of those things and seasonal depression in winter when one leaves in the dark and comes home in the dark all has no effect....I think that's just hubris.