Obviously, he is very wrong in this case.
I am yet to see an opinion from BADecker which could be called anything other than "very wrong".
We seem to be becoming reliant on our scientific advancements to save us from threats at an increasing rate as a way to avoid being accountable for our own poor decisions and behavior.
This is not unique to the field of medicine. We depend on scientific advancements to create enough food for us, to supply clean water, to build adequate shelter, to protect us from predators, and so on. Drop the average American in to the middle of the jungle and I would wager they would be dead before they could find drinking water.
I don't know what you think about the role of vitamin D in all this.
The evidence I have seen seems to suggest that a deficiency in vitamin D can make COVID worse, rather than extra vitamin D being protective against COVID, but I haven't spent a huge amount of time reading around this topic. Regardless, the majority of Americans are deficient in vitamin D, especially those in more northern states, and should be taking a vitamin D supplement anyway.