Yes, it wouldn't be fair for responsible gamblers who uses credit cards because for them, it may be the most convenient payment method to use. Of course, using credit card as your payment method can also have a negative effect because sometimes you cannot keep track of how much money you're spending, but if you are responsible enough, you will not let these things happen. It always boils down to the person, we are always responsible on our own choices and that you we should be held accountable of our actions.

I think one way we can do to avoid this from happening is to assess whether we are a compulsive or a controlled gambler, and after you know what type of a gambler you are and happens that you are the compulsive one, it's better not to use credit card when engaging in any gambling activities and that you should find any other alternatives as a payment method.