“I didn’t know this either. Childbearing makes women less likely to have breast cancer?”
It’s a hormonal thing.
You have a higher rate of ovarian cancer if you are childless, also.
Breastfeeding is also a hormonal thing. Breastfeeding is best for mother and baby when possible.
By the time you have breastfed for seven years (total, not continual!) you have almost 0% chance of getting breast cancer.
Whew - then I am safe!
Why does the left/science always want to defy nature?