No, screening tests have research-based strengths and weaknesses. Doctors know this. Mammograms are only effective part of the time. Some, like my father, who had a seizure in 1942, didn't fully develop his brain tumour until age 77.
As Mr. Lewis (not THAT Mr. Stephen Lewis) says, there is a lot of overkill and the CMA did not respond.
Ontario Spent $110 Million to Get Doctors to Increase Cancer Screening Rates. It Didn’t Work. That’s Good News
Briefly: From 2006-07 to 2009-10, the Ontario government gave family doctors $110 million to boost screening rates for cervical, breast, and colorectal cancer. Never mind that there is a lot of over-screening for cervical cancer (many women get a Pap test more frequently than the recommended every 3rd year) as well as under-screening. Never mind that the evidence for universal breast cancer screening grows shakier by the year. Take it at face value: spending designed to achieve specified effects.
It flopped. Family physician Tara Kinan and colleagues have just published a study that shows no impact.