I don't thing that's what was meant. We all know it's a matter of getting used to it. However, there are people who somehow cover it. If i'm feeling hot for some reason, I'm not gonna get naked, right? Even though I feel like it. And a baby being hungry is as legit as me not feeling well because it's too hot.
This said, I really don't have that much of a problem with breast feeding in public. But we should find a middle ground. My mom has told me she didn't have a problem breastfeeding me in public, but she always carried some sort of cloth to cover the boob, so she could have some privacy, even though she was in public.