I am fully in support of breastfeeding and recognize that it has many benefits to moms, babies, and societies as a whole. That said, I really feel like Ms. Pine is trying to make herself into a breastfeeding martyr when she is not one. The issue here is not that she chose to breastfeed her child. The actual breastfeeding is not even an issue. The issue is that she did not behave in a professional manner and neglected to fulfill the responsibilities for which she was hired. The students in that class are paying several thousand dollars for her to instruct them with her undivided attention. They're not paying for her to be distracted by a young child that is crawling around, fussing, and nursing. She's not a random math tutor that is working out of her home--she is a university professor. Every working professional who has a child knows that childcare emergencies come up, and every working professional who has a child finds some way to deal with them.
Would it be appropriate for the conductor of an orchestra to bring her sick child to a symphony performance and let the child crawl around on the stage while she conducts? Would it be appropriate for a judge to bring her baby into the courtroom and then nurse the baby while court is in session? How about a surgeon bringing her child into the operating room because she couldn't find a sitter? Can a civil engineer bring a baby with her to present a new road construction project? The answer is no. And it's not because the babies are being breastfed, it's because the women would be shirking their professional responsibilities.
She should have done what every other working parent has to do due to a sick child--find an emergency sitter, call a family member, call in sick to work, cancel appointments, etc.