My husband was one. To be honest, I think some of us who had a miraculous change and spiritual experience tend to use it. I considered my husband one because while I was/am growing up, he remained the same miserable man. This ultimately led to his relapse. It was frustrating to watch. I didn't want to leave him behind.
Generally used for those miserable in sobriety who do nothing to try and climb out of it. Happy when it rains so-to-speak.