Because the story is useless. Story shows that cancer death rate in SF is ~160-200 per 100,000 depending on demographic. Overall US cancer death rate is about 1

Because the story is useless. Story shows that cancer death rate in SF is ~160-200 per 100,000 depending on demographic. Overall US cancer death rate is about 170 per 100,000 (https://www.cancer.gov/about-cancer/understanding/statistics https://www.cancer.gov/about-cancer/understanding/statistics). The "real" story is SF has a lower rate of death from heart disease (which is the leading national killer) than usual. And for reference, heart disease and cancer nationally are almost neck and neck (http://www.cdc.gov/nchs/fastats/leading-causes-of-death.htm http://www.cdc.gov/nchs/fastats/leading-causes-of-death.htm) So yeah, it's a useless story.