Because they are a BIG DEAL, unless you don't like girls. I always get annoyed by the stupid comments (usually made by women) that "they're only breasts, what's the big deal" when every functioning human being knows breasts are sex objects; that's why men find them "attractive".
Everything has its place, and big puffy tits with bullet nipples belong in private. Let's deal with reality.
That's your opinion. You see breasts that way and you believe that they belong in private. However, whenever a woman walks out of her home she brings those breasts with them so there's no way to be private about breasts. Whether there's clothes over them or not.
I seriously need to know why you believe that only you have the right to your opinions and your beliefs. Why do you believe everyone must follow your beliefs and way of life?
No one is stopping you from seeing bare breasts in private. Yet you insist that you have the right to tell everyone to act as you do. Not everyone believes as you do and not everyone lives as you do.
You have no right to tell a person what to do or believe or think or how to live.
And you're wrong. Breasts are for nursing babies. They provide milk to feed babies. That's what they're for. Not for you or any man to turn into a sexual object for your pleasure or your sick beliefs.
No woman should hide her breasts. They should be proud of them and not keep them "private" because you're uncomfortable with seeing them bare.
Whether they're covered with clothes or not, they're not there for you or any man to sexualize.
Your post reads like it was written by a sexually repressed 12 year old boy.