It is a strange mixture. When clothing produces sex, it artifies the given and makes of it a unity. When I wear a dress, its purpose collides with a biology. It highlights my body, and points out that it doesn’t fit.
Gender roles are made. But it is not so easy to say we are a blank sheet of paper and could be anything. Because in our idea of gender, sexus matters.
It is much more the case that a biological characteristic is amplified and emphasized. Gender roles put the body in context.