Personally, I associate sunlight with less health because of how it makes me feel - uncomfortable on a good day but often like having the flu.

Some of that is tied to our daily 85° dew points but once the sun goes down the dp feels livable.

But even without high heat and humidity, sunlight feels relentlessly, painfully bright. The best I can hope for is to ignore it.

Conversely, cool cloudy days feel like the relief after a long, bad headache. And fog is the finest weather there is.