Men do have breasts. They are simply not as enlarged. But again you are missing the point because a flat-chested woman would not be allowed to show her breasts either. Maybe men are just better genetically because we are not born so immodest?
My argument summed up is that woman have certain non-sex related body parts (could be hips, could be breasts) that have certain display requirements thrust upon them because they cause sexualized ideas in another group of people (mostly men). As a society we decided that these sexualized thoughts are bad and should be stopped. OK, that’s acceptable. However the method we decided to do that is to tell the women to hide those parts so the other group is not tempted. Problem solved. However woman are being forced to modify themselves by society in order to fix a problem inherently caused by another group. They have no control over how the other group perceives them, so they shouldn’t be the ones having to adjust constantly to others’ perceptions.
It used to be that fat was sexy. Who knows, maybe in the future it will be flat chested. Depending on what men become sexualized by, women have to constantly change their appearance so as not to tempt man.
If you don’t find that ridiculous, let’s sub it out with a similar example. Imagine a group of white people who, whenever they see black people, felt “uncomfortable” because black people in their minds are associated with crime, thugs, etc. Let’s say that, in uncommon instances, the white people felt threatened and may have started fights if the black people looked particularly like criminals, or maybe the black people felt prejudiced and started fights. Let’s say the government’s solution to the problem was to segregate the black people from the white people, but they did so by telling the black people to not live in existing white neighborhoods. Problem solved because the instances of black on white confrontation are abated. Is it fair though? No, because it’s inconveniencing black people in order to solve a problem caused by the view point of white people. Black people can’t control how others view them, and if the problems are inherently caused by those misguided viewpoints then we should be 1) fixing those viewpoints and 2) telling people with those viewpoints to deal with it.