I see it wrong if you can't handle your emotions thats it
Not only the emotion but also the money that you are pulling in your pocket when you gamble. Things are becoming wrong when it's too much and as for gambling, when you are gambling too much and you can't control not only the emotion, the priorities, the money and other important things that you need to remember then you are affected in a wrong way.
So you say that gambling with money is bad, but what about that kind of gambling where you take points or chose between two sides of a coin? It is actually gambling, but this kind of gambling we can't call bad, cause of it is gambling for the interest without gaining any profit.
you should get back to the real and proper definition of gambling itself and then you might could find out whether that kind game considered as gambling or not , however as long as you can be wise and responsible in gambling , it shouldn't be considered as wrong at all.
you lost millions dollar , but then you just fine and walk away. you lost 10$ dollar but then borrowing another 10$ and so on until you get in huge trouble , then gambling are completely wrong.