I've never heard of women getting permanently lopsided breasts from nursing a baby, although they do make it clear from the beginning that you need to start feeding on alternate sides each time. I thought the idea was just to keep one breast from becoming engorged with milk? Or from ceasing to produce enough milk because it was unused?
At any rate, this woman had already gotten implants before she had the baby. If she was unhappy with her breasts before, it's unlikely she'd be happy with them after pregnancy, breastfeeding or no. She's a model (so I assume she looks pretty good) who is dissatisfied with her looks at 28. How likely is she to be satisfied with her looks at 45? She brags about how she only gained one stone in pregnancy, not because she was obese or trying to do the best thing for her and her baby's health, but because she thought it was important to look good and to wear non-maternity clothes home from the hospital. She feels new mothers who don't share her priorities are "letting themselves go" and to blame if they develop depression. A tad cruel perhaps?
Edited to say: my mistake - it was another mother later in the article who said she only gained 14 pounds and left hospital in regular jeans.