The motivation is to know the truth and to focus on interventions that can help. Note this study gives us no information on whether taking vit D before you bec

The motivation is to know the truth and to focus on interventions that can help. Note this study gives us no information on whether taking vit D before you become sick helps or not, it cannot answer that. I think there is very low risk of taking a Vit D supplement. What it does do is give doctors more confidence that making patients take another pill when they are already sick in the hospital won't do anything to help them. This saves unnecessary costs, possible side effects (albeit high dose Vit D is still relatively harmless), and patient comfort (when you are as short of breath as some severe covid patients even taking pills and eating can be a challenge). There are many supplements that people very strongly believe help covid without good evidence beside vitamin D, why shouldn't we take all of them all the time? There are people and doctors who are passionate about the potential benefits in covid for: ivermectin, Vit C, Vit D, Zinc, famotidine (AKA Zantac) and hydroxychloroquine. At some point we have to actually look at the data.