" Lacking definitive research, any risk of exposing the body to sunshine while sheltering in place is clearly outweighed by the risk of COVID-19."
That does not make a clear suggestion which is less risky IMO.
In that the risk of simply walking into the sunshine with not a person in sight, increases one's risk IMO at least an order of magnitude less then the risk of singing on one's balcony with all your neighbors accompanying at night without a mask in sight, and I have yet to hear any objections to that behavior, other then mine.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.