You are right. It's about the judgment women use when they expose themselves in public. They think little of themselves, and should not be surprised when others think little of them as well.
Many years ago I boarded an IRT subway train in Manhattan for a fifteen minute ride to Brooklyn. Seated diagonally across from me was a rather chubby young woman with a crying baby in her arms. About five minutes into the ride the baby was still crying insistently and quite audibly above the noise of the train. The frustrated woman got up and moved to a vacated end seat, turned toward the wall, opened her jacket, pulled up her sweater and bra and popped the crying baby onto a big, swollen tit. Rather than let her baby cry for the sake of cultural decorum, she fed it.
Changing her seat and turning away didn't fully conceal her but it was a respectful gesture and I saw absolutely nothing wrong with what she did. I was initially amused by what I saw but I turned away rather than stare rudely.
It was not like this woman just decided to expose her tits for the hell of it. There was a perfectly good reason for doing what she did and there certainly wasn't anything sexually arousing about it. I did notice none of the other male passengers seemed especially interested but one older woman shook her head disapprovingly, which at the time seemed rather curious to me. I think I have a better understanding of the reason now.
While most men seem to be attracted by "big tits," I'm not -- because I'm an
ass man. Over the years I've observed that womens tits come in all shapes and sizes, and while a small percentage of them are well-formed and a pleasure to look at the majority are not. In fact some of them are offensive to the eye and about as romantically interesting as a club-foot.
So, I believe that women who do not have "nice ones" are well aware of their shortcoming and for that reason are strongly supportive of rules which require universal concealment of their dangling puppies.