for half people gambling is wrong but for the other gambling is not wrong, its depend on how we make the perception and how we can understand it.
gambling actually is just a games with the money and its back to us how we judge this. if you think gambling is not wrong, then go ahead, play gambling and try your chance but if we are not ready to loss our money then we should stay away from gambling and don't even think that we can win with easy.
We are the only one who are making gambling wrong, the gamblers. Because we are not being a responsible gambler as we gamble.
There are some cases that instead of securing some funds for our daily expenses, we are using it just to satisfy ourselves in gambling.
I admit, I've done this before and that is an irresponsible act and that made my hobby wrong in the sight of everyone.