It is because when a Lady is watching tv and sees that fat idiot, she turns to see her Husband and thinks about her life then realizes that she has it better than them on tv. Now she feels better about her life.
If she was watching a show with a fit, well dressed and educated man treating his woman well, she will then look at what is sitting next to her and get depressed. "Why can't I have a Man like that?" They are pleasing the Women audience.
The Wife is hot because that is how they get Men to watch.