In BB, Walt descended into a life of crime because he wanted to provide for his family after his death. He was not evil (although he eventually became one) but had to do evil deeds to support his family.

Meanwhile, Skylar fucked Ted because Walt was not giving her attention and Ted was giving her the feels.

The difference is this. Most of the time, men commit evil deeds for their loved ones and rarely for themselves. However, women commit evil deeds only for themselves and never for their loved ones.