And yet the human race somehow survivied. Amazing!
Would you be happy settling for the poorer health and nutrition that many babies suffered a hundred or 2 hundred years ago - or would you want the best that modern developments can provide for your child?
Kids died back then from poor nutrition and needs that weren’t met by breast-feeding.
You may as well say, ‘you don’t need an antibiotic for that serious infection - your ancestors managed fine on their immune systems.’