> In one case of a child who had suffered broken bones in which Holick defended the accused parent, the child later went on to suffer severe brain injury, for which the parent has been indicted.
as well as this interesting theory:
> Holick has speculated that the dinosaurs may have died of rickets and osteomalacia caused by a lack of vitamin D in reduced sunlight
https://en.wikipedia.org/wiki/Michael_F._Holick
and the only repercussion he has faced was the place he works not allowing him to treat children anymore.
If he hasn't had his medical license revoked I doubt any doctor simply recommending vitamin d would have theirs revoked.
I think any doctor would tell you to take supplements if your lab tests showed that you're low. There's nothing controversial in that advice.
If such an authoritative source claims pseudo science and danger, your annecdote could very well be true.