Many kinds of betting markets are or were banned all over the world. The sky didn’t fall, and what underground markets existed didn’t lead to huge gang wars or whatever.

Given that the article is discussing some of the bad behavior typically associated with dark markets (death threats, extortion, fixing) happening in the light, what makes you think that banning them would make things worse?

    What you're showing me is a [war crime], which has existed for time in humans.

    [Wars] of all kinds have existed for a long time and haven't been banned.

    Banning on [particular tactics in war] altogether and pushing it underground would make things far worse.

Do you see the problem with your logic?