The Sun is Good For the Skin?

I have always been told , and believed that exposure to the sun is deadly. Given that my skin is extremely light and I have had skin cancers before, it would seem wise that I avoid the sun and that I wear sun screen when I am in it. Every dermatologist today preaches covering oneself with sunscreen is essential to avoiding skin cancers.
But new studies are now challenging that practice. Now the feeling is that maybe putting on the sunscreen is increasing the probability of cancer (though not skin cancer), because vitamin D (nicknamed "the sun vitamin" because that is the main source of the body acquiring it) seems more important for preventing and even treating many other types of cancers.
Since sunscreen blocks the production of vitamin C, some doctors are now recommending not using it unless an individual is in danger of "burning" in the sun. In the past three months four separate studies found that sun exposure helped protect against lymphoma, prostate cancer, lung cancer, colon cancer, and ironically, skin cancer. But most people do not get enough vitamin D, because it is hard to do from food and fortified milk alone.
Supplements are also questionable as to effective acquisition of Vitamin D. So the thinking now among some doctors is that even if too much sun leads to skin cancer, which is much less deadly than the other types I mentioned, too little sun may be an even worse choice for people. Scientists and doctors associated with the testing on sun exposure say that we should all get "safe sun"- 15 minutes or so a few times per week without sunscreen- to help protect against many types of cancer. Doctor Edward Giovannucci, a Harvard University professor of medicine says vitamin D might help prevent 30 deaths for each one that is caused by skin cancer. "I would challenge anyone to find an area or nutrient or any factor that has such consistent anti-cancer benefits as vitamin D," he told other scientists at a recent meeting of the American Association for Cancer Research.
If this new outlook becomes the accepted norm I wonder whether people (as they always seem to do) will go overboard and instead of brief un sun screened forays, would bake themselves into cases of skin cancer.
But vitamin D has been proven to slow down or stop abnormal cell growth, help cells die when they "are supposed to", and limits the formation of the blood vessels that feed tumors. It has long been known that cancer is more common in the elderly, and that the skin makes less vitamin D as people age.
So what do we do? Should we expose our skin to the sun and retard the growth of many types of cancers or expose our skin to the sun and raise the probability of skin cancer? I'll stick with the sun screen for now.