Why does this keep popping up?

"Evidence does not support the use of vitamin D supplementation for the prevention of cancer, respiratory infections or rheumatoid arthritis. Similarly, evidence does not support vitamin D supplementation for the treatment of multiple sclerosis and rheumatoid arthritis or for improving depression/mental well-being."

https://pmc.ncbi.nlm.nih.gov/articles/PMC4907952/#:~:text=Bo...