Why I agree that the judgments are unwarranted,(in every case) the fact remains that it is scientifically proven that breast milk provides numerous health benefits over formula. If you were fed formula, you have, on average, a higher risk of everything from a childhood cold/flu to asthma to leukemia.
While every mother needs to make the best choice in her particular circumstance, choosing not to breastfeed for the sole sake of some convenience to the mother and/or others is not a responsible choice, in many people's opinions.