2. Because these sensationalized risks are the ones that get coverage more than the true risks
There is plenty of coverage of the risks of smoking, bad diet and lack of exercise. It's in schools, it's in government materials, it's in posters, on packs of cigarettes, TED talks. There are non-profits dedicated to this causes creating propaganda. There are even national fitness and stop smoking days. No one in the world can claim, "Oh really? smoking isn't healthy? damn, I wish I'd known that!" They're making choices for themselves (modulo addiction and cognitive difficulties). I don't know how much more coverage would personally satisfy you.
Calling the article about cell phone risk sensationalized is out of proportion and not just a cute exaggeration. This is simply another article in a newspaper that runs hundreds of articles a day. If it were on a billboard, if television was interrupted, if a national holiday were declared, these kinds of things might render it sensational. However, it's simply a news article on a web page between an ad for women's clothing an a breast cancer medicine ad.
Maybe you think information about new health risks should be stowed further in favor of improving the health of people in general. If you feel strongly about that and you're not just trolling, I urge you to take some action and attempt to change peoples' minds about smoking, diet and exercise yourself, because you haven't changed my mind at all about the importance of researching and publishing the potential risks of cell phones.