Most women can produce enough milk for their babies without the need for formula.
But, it can take a lot of time and effort. Plus, once a baby is weaned, the mother might not be able to produce milk again.
Bingo! We have a winner. Because breast feeding, created by God for His babies, interferes with the modern woman's "lifestyle".
I am a non-breasted person, but I am the sperm donor for seven children, all of whom were nourished only by my chest-feeder, which went fine.
I think the support for this hysterical reaction, mostly from persons of uterus, that “many birthing persons can’t do it” is just nonsense.
If chest feeding was too difficult, or commonly didn’t work, there wouldn’t be mammals.