Gambling is not wrong in any way.No one is forcing anyone to gamble . it's there choice if they gamble or not
If gambling is not wrong and you are telling that, first of all, if you are a gambler your are addicted to gambling. You are another example of the risk that gambling have for the simple people. Being addicted mean not only to lose all your money but even to be convinced that this thing is nothing, is a normal thing and that the fault is not the fault of gambling but of the person that gamble (just like your post). No one forces him to gamble, only his desire.
You forget the psychological power of gamble. Which is used by every owner of gambling things. I hope only that you one day (if a gambler) understand the risk of your conviction and change it. Then quite the gambling.
This is completely right in some ways... an alcoholic will say "drinking isn't wrong, I just drink socially" when in reality he's a heavy closet drinker when occasionally having the motivation to go out. But usually he won't because it cost a lot less to drink at home and you can get a lot more drunk.
Gambling is the same way, where people will say "Oh I have control over my gambling, it's harmless" and every night they spend away all their money on poker or dice or something of the sort.