I do think that what the government is trying to do is by preventing addiction rather than curing it.
Though this may be the case, I find it too restrictive to the point that there are states that completely prohibit online gambling. But, this kind of problem may easily be remedied by visiting other states and gambling on it. While it may be inconvenient for you, but it relatively solves the issue of complete prohibition done by some states that prohibited gambling.
Again, while I am not in favour of completely prohibiting gambling, I do understand the implication that the government did by making this move.
And like the saying says "prevention is always better than cure" But when someone is already addicted, then curing would be the obvious thing that we can do to get their selves back to normal. Restricting/banning gambling is one of the ways to prevent people from accessing it.
Maybe you are new on gambling that is why you find it too restrictive when some states are prohibited about it but did you know that there are countries where gambling is fully banned? So how about that? I think that is more restrictive. It's true that there are remedies but not all can do it, so this is better than if the government won't take any actions and just watch the public turning into a compulsive gambler.