Gambling will only be wrong for the persons who are addicted to it. It surely wrong for them because there are many possibility on what they will end up if they won't stop or control them selves.
So blame those who addicted to gamble instead of blame the gambling itself. If they cant control themselves and get addicted, so it is absolutely their own fault.
Yep, if someone has a gambling problem or they just can't seem to win, it's their fault. The site is provably fair and is simply a tool to help people out on their needs. It's not the site's problem.
It is definitely not wrong, since gambling is just another way of playing risk, like insurance.