You don't HAVE to.  I just do a multivitamin on most days, mostly because while being nutritionally dense, they are expensive if you're looking at price point per calorie.  Also, she may still do plenty of veggies but just cut out starches like peas/corn (growing up my mom always thought they were vegetables...) and semi-carby veggies like onions and carrots with the article misrepresenting her.