These people don't do things if it's not directly profitable. This is why I don't believe the chemtrails theories. There is no hocus pocus, they invest, and want to see the money back. D3 is relatively cheap as a supplement. I use sunscreen all year round but I also supplement D3. I was deficient and yes most people are. D3 levels were shown as very important in affecting covid mortality, they analyzed seriously ill covid patients data and released the statistic, apparently the better your levels, the better chance to survive, and low levels had high mortality rate, over 90%. Forgot the country that released it. So why the media isn't trumpeting this information day and night, I do not know. They said something about how they cared and wanted to save lives. Bla bla.