What's the big deal about boobs??

Ms
I just don't really understand the issue.
Want to openly breast feed in public-people throw a fit.
Want to leave your house without a bra-that's disgusting and inappropriate.
But wear a skimpy bikini or a shirt that's 3 sizes too small with a push up bra, a deep v-neck-that's perfectly acceptable.
Why are boobs only ok if they look attractive? How is a breast feeding mother or bra-less woman any less classy that the girl with a massive amount of cleavage?
And why does everybody even care so much what other women do with their boobs anyways??