Its differ from everyone's perspective. For me, it's not wrong for gambling because I treated gambling is a very risky investment. You place money to get more money not very different from nowadays investment, but very risky win big lose big.
I don't understand this what the wrong way is in gambling? And what is the right way in gambling? According to me, Gambling is just game. How you treat gambling is the matter. If you play this for money, then it is wrong. But if you play gambling just for fun or entertainment then it is ok. Finally playing or not it depends on you.
You are right, there are some people who consider gambling a way to become rich with and that is wrong as they lose at there and do not find any solution to earn back their invested amount and just invest again and again and so lose their wealth in there. For those people it is totally a wrong way to adopt.