I don't like a nation of sport gamblers as they would be in default debt really soon because no one would really work,all of them would have their mind in their betting.
A nation of sport gamblers will have the problem of having citizen who are mostly Irresponsible. The gambling will not affect everyone making everyone irresponsible, but it will surely have the number of irresponsible people more than the responsible. The irresponsibility is people who gamble without control, and those that will do anything just to keep getting money to gamble including involving in crime.
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.