Gambling has no difference on anything that is addictive, except for their effect.
So entertaining it in the first place is like giving it a chance to tie you to it. You have a point there that when we are "winning, we really feel happy". That's one reason, aside from that, there are other gambling addicts who are there not because they are enjoying it, but because they have no choice, and gambling is their bread and butter.
It's addicting but as long as we have the discipline we will be able to succeed in gambling, this could be hard for the majority of gamblers but I know there are people who are born to be good in gambling, we should where is our place because if we force ourselves in believing that we are good and we can be rich in gambling even not proving it, that will only create a bigger problem.