The way you see the world is simply immature.When you buy a futures contract, you take the other side of someone' order, are you unethical? Are you a bucket shop since you have conflict interest with someone else? If you prohibit unethical action in market then you prohibit market itself.
A market maker takes other side of customer's stock order and is unethical and a bucket shop?
In a prop firm challenge the firm takes the other side of a trader's order, is a prop firm unethical and a bucket shop?
Even in a supermarket, when you buy something, the store takes the other side of your order, is the store unethical and a bucket shop ?