So... It's long been known that exposure to the sun creates vitamin D in your body. What was only recently discovered is that vitamin D deficiency can lead to bad things like breast cancer, colon cancer, and prostate cancer. So by following advice to stay out of the sun and avoid the easily treatable skin cancer, we have created vitamin D deficiencies which can lead to much worse results. This is why I usually ignore things like stay out of the sun or avoid trans fatty acids. Five years later they find out there are tradeoffs. And in this case, I'd take an increased risk of melanoma over prostate cancer any day of the week and twice on Thursday. How many people died of cancer because they did what they were told and stayed out of the sun, didn't have enough vitamin D, and thus got a big ass tumor up their butt?

Moral to the story.... If you've been doing something your whole life and it hasn't killed/hurt you, use some common sense and ignore the people who have suddenly decided it will hurt you, despite years of actual real life evidence to the contrary. Reality is a far better measure of cause and effect than statistical correlation studies. Few of those studies bother to look at side effects and collateral damage.