Why do female wear low cut tops and complain when males pay attention to "this focal point"?

I have seen many women and girls the wear all kinds of low cut shirts, sweaters tops and dresses but when a guy looks at her chest they always have some kind of complaint. Jeez , if your gonna advertise the merchandise people are gonna look. If females are uncomfortable with so many guys looking, then maybe they should dress a little more discreetly. Im not saying to wear baggy t-shirts and/or sweatshirts but there are other clothes women can wear to look attractive without getting unwanted stares.