What the heck is going on with this BC thing????????

My surgeon’s nurse said ‘because you are post menopausal and have breasts’. Haven’t had anything much clearer since. No family history, breastfed for almost a year (not my intention but child had other ideas). Light smoker before giving up decades before, did drink alcohol though. I took the pill but had also been off it for over 15 years. There may be reasons but blind chance figures in there too.