The small-to-average busted, as usual, do not fucking get it.
They don't live with the cat-calls and the wolf-whistles. They don't have men talking to their tits and not their faces. They aren't presumed to be promiscuous just for existing. They don't have men trying to cop a feel on the reg.
They can do sports without being in physical pain. They don't gave to hold their tits to run for a bus. They can lie face-down on a massage table comfortably.
They can buy bras and swimwear that fit from supermarkets. Their "right fit" bras can be cheap. Their "right fit" bras don't hurt them, wires impaling armpits, cutting in, and shoulder straps causing migraines. They can buy clothes that fit and fasten properly. They can buy fitted jackets and coats and dresses. For them, buying a suit for a job interview doesn't require a jacket several sizes too big followed by expensive alterations. They haven't taught themselves to sew just to avoid the costs of alterations.
They see the male attention and think "I want that" without considering how frightening it is to live as the permanent target of male lechery. They weren't turned into sex objects whilst still at primary school, so many big-boobed women were "early bloomers" and wearing adult bras at that age. They don't know what it's like to have a sexual assailant talk about how he likes your big tits whilst he gropes or rapes you.
No, OP, YANBU. Those who said you are can fuck off with their misplaced envy.