I don't see the logic here, even Odlov is using examples from personal life as arguments against something in general. yes, that does prove that it can be corruptive, but not if it is corruptive to a formidable degree on a larger scale.
Let's compare this to alcohol. Here most people start with "gambling is bad, it's designed so that you can't win (based on the fact that games are balanced so that if the results were random, the player always ends up losing money in the long run)" or "yeah, my *close relative* was had a huge gambling problem, it's definitely bad". Whereas with alcohol the correspondents do show up, but most of it is either bragging: "I drink almost every week, has really no effect on me other than helping me let out some steam, which is actually positive", or supporting with arguments based on how integral a part it is of the modern culture, how fun it is (they say, haven't tried yet myself), or the direct positive effects (a glass of red wine a day especially, but even one portion of any alcoholic beverage in a week or something has some benefits). They, however, are ignored here.
But gambling IS an integral part of the culture. Toto is the example of an expensive and hardcore old people's hobby (hardcore and old people, lol). Casinos and Las Vegas are the same for places to go to have mindless fun. Here in Finland it's a cliché for old grannies to be playing the slots, video poker and bajazzo machines (although less so with the latter, small wins). Not to mention Lotto and the like, which, as I said, don't necessarily have any lasting effect on the buyer's finance, but in the event of a jackpot, have a huge positive effect.
Gambling is also a form of fun. There are (illegal and legal, in here, for example, it's legal) poker rings with friends, there's dares, and as mentioned above, a night gambling is the classic way to use money if you have it, although of course since most people don't, it's more related to culture than fun. Gambling also often supplements one of the most popular pastimes, couch sports (if that's not a term in English, I mean watching sports without necessarily doing sports yourself).
as for benefits, I have to agree, the benefits here are either not as "surefire", not as immediate, or not as visible as with alcohol, but they're there. The biggest benefit is that it allows clubs and the like to gather funds, or if the industry is monopolized by a state-run business (RAY, correct me if I'm wrong about whether or not it's state-run), it allows the state to supplement it's tax incomes and use them for defense and the common good of the people. Then the indirect and not surefire ones. First of all, you can enjoy it, or some of you can anyways. people enjoy skydiving which can kill them, or buying expensive things which can make them bankrupt, or even running an extreme sports or other dangerous business and eventually end up both bankrupt and later dead. Secondly, you can win. Depending on what you gamble on, it may be probable, or can be affected. In games you can affect your chances of winning somewhat. As I pointed out, casinos try to make this harder, but it's still possible, and even so, the problem isn't with legalized gambling, it's with the lack of regulations on how to imply it (no unfair moves on the provider's part, that is). As for with casual gambling (which is legal in some places, although not in America I take it), you can affect your chances, be it often a dicky move to a fellow person. That's not always true, though, with dares, for example, where all you have to do to win the bet is to do something usually embarrassing or insanely hard (or dangerous, but that wouldn't be a wise dare to accept).
wall of text, but that's what it takes to practically run this side alone -.-'