Heart disease kills more women than cancer. Cancer is the #2 killer of women, all ages, but breast cancer isn't the #1 killer cancer-- lung cancer is (unless you're Hispanic).
Now, looking at a breakdown by ages, one can see that accidental injury is a much bigger killer than cancer from birth through age 34. 35-74 is prone to cancer deaths, but then, post 74, you're looking at heart disease.
You are significantly more likely to die of cancer if you're a man than a woman. Lung cancer is the number one killer for them, as well, with prostate #2. Both rates are higher than the #1 and #2 rates for women. But we don't see guys displaying ribbons everywhere for prostate cancer.
So helping people quit smoking and keep their hearts healthier would keep more people-- male and female-- living longer. But I guess it's easier to tie pink ribbons around everything and plaster the word "boobies" everywhere in the name of girl power.