So the question is, do you need to have your issue resolved before you can minister in that area? Like a drunk still drinking, can he be an AA sponsor? Or, a sex addict still indulging but guiding others away from porn?
The answer seems obvious, you say, "of course not!" So do I.
But is it really that simple?
What about the mother whose own mother's atrocities keep her from repeating the error? Or, the woman who uses the lessons from her abusive ex to forge a good marriage?
What if these people still harbor hatred and venom and use that to make goodness? Does it taint the good being done? Is it vinegar instead of wine?