I don't think anyone would call blanket banning "elegant", even if it would be the best solution.
"They estimate that legal sports betting leads to a roughly 9 percent increase in intimate-partner violence."
I'm sure the numbers are probably right, but I can't help but feel some of this is reaching a bit - many population causation studies seembto be more about triggers than true root causes. Just because betting triggered this doesn't mean betting needs to be banned. What this should lead to is better support and treatment for people affected by this type of violence. If it's not betting that set it off, it would be some other stressor (probably also money related or feeling like a loser). Trying to fix the person's behavior such as impulse control and anger management would be much better than progressively banning everything as the next trigger emerges.