Could you link to studies backing up your claim about 'visible skin health and beauty'?. I have searched for these a lot, but I cannot find thorough literature study type of research about this.

Except for the 'sitting in office all year and then sit in the sun for two weeks straight and get 14 sun burns is not good, so you should use sunscreen' message, which is not very helpful and could conclude also that one 'should expose to sun moderately, e.g. at least an hour a day if possible'.