Interesting article. Problem is, they can't always know the true nature of the tumour from a biopsy, and they don't know if it will develop. My tumour was mostly invasive ductal carcinoma (IDC), grade II, but there were some areas of ductal carcinoma in situ (DCIS) within it.
I understand concerns about overdiagnosis and overtreatment of incidentalomas, but IDC has to start somewhere, and a lumpectomy for DCIS is better than mastectomy, chemo, and radiotherapy, and the risk of metastatic disease.
Comments on this story on the NYTimes are sceptical about this being driven by the desire to cut healthcare costs. An ounce of prevention ...