It is clear from what you say that all gamblers should have a limited amount to gamble in a casino or online. This is the frequent problem of a gambler, which is why it always leads to big losses in gambling. Those who don't know how much they will lose gambling in a casino.
Who will limit the gamblers to put limited funds in gambling? The gambling sites won't impose such restrictions on them. They will want that gamblers put as much money in gambling (and lose it too). The players themselves have to care about their money and limit their gambling activities. The ideal case should be that every gambler play with only that money which he can afford to lose. They should not bet with extra money other than the one they know can be lost, without causing them much financial loss.
But if we have a set amount to bet on gambling, we can also practice self-control and discipline in gambling. And if all gamblers can do this, for sure there will be many responsible gamblers, as long as we can afford the amount, even if we say a large amount, as long as we can win, and that's how simple it is to understand.
We need to find discipline in gambling before it is too late and we lose all our hard earned money in gambling. The experienced gamblers know the important of risk management and they gamble with discipline and restrict themselves from extra gamble.
If you think that we will win no matter how big risk we take, then we are wrong and soon we will realize our mistake when we face the loss in gambling.