Completely anecdotal: My maternal grandmother and a maternal aunt both had multiple miscarriages. They both died at young ages from breast cancer. There could be genetics here, I don’t know because I refuse to get tested for the gene, but my mom and her other two sisters have no problems yet. They’ve outlived their mom and sister.
My wife had BC after losing our son. I think it’s a caused by the rapid hormonal shock to the system when the breasts are in the process of changing over to provide milk. Then everything is turned off all at once - abortion, miscarriage doesn’t matter.
I think it’s real and people are paying good money to shut it up.