Well, sarcasm is against the guidelines I think, so let's say it was reductio ad absurdum. I'm responding to the idea that gambling+skill is just as bad, or bad enough to also ban. It would make the legislation and policing a lot simpler, close up some loopholes, and would have the side effect of outlawing the stock market, but I'm still against it.

Like gambling?

Yes. Consider the tradeoffs carefully. Try the experiments. Do the research. Then make a decision.

Haven't you already made a decision by saying "if the research finds X is true, we have a moral duty to ban gambling"? It's the is-ought problem.