For me there are two main points to consider here.
1. "Gambling is illogical. The odds are against you"
This argument is technically true, but in practice it can be moderately wise to gamble. As the person who used it here said, some people enjoy gambling, so if you can afford it, fire away. Secondly, with, say, lotteries (since this is on the topic of casinos, this may be ever so slightly off the point, but still it's gambling), what you pay for a chance to change your financial horizon for good has little to no effect on your finances if you do it wisely. It doesn't hurt having a lotto line or two going every week, it's a fraction of your salary. Then there's the fact that you can actually be good in "gambling". Even though (I take it) the term is defined as "guessing the outcome of something completely random", it's not that. In poker you can read other's tells, or just play your cards wisely and go for realistic hands if you know others will be reckless. You can count cards (inside your head) in blackjack. Likewise in derbies you can know things about the horses, although this is a bit more professionalized than your average Sunday better.
2. Casinos cheating.
A lot of you may have been screaming "lol, what an Exzibbyt, doesn't he know you can't count cards in blackjack, you get banned from the casino", or something of the sort, either inside your head like normal people, or in three-line posts like /b/tards who get seizures trying to read more than five lines of text at a time. Raging aside, this is the reason people think gambling is bad. This is the reason it actually is bad and destroys lives. Casinos do kick good players out. That's cheating. If someone can count cards in their head, let them, or change the game so that it's downright impossible, not only to the average mind, but logically too, so that the outcome of a draw really is random. And it doesn't end there. You don't have to "cheat" to be kicked out, you're not allowed to be too good. It's like banning a team from using a layer that's better than any of the opponents. Secondly, they lay out the establishment in a way to encourage people to spend more, which I guess should be considered just good planning. Still, (I don't know if it's a myth but it's what I hear,) pumping oxygen into the gambling area is a bit unfair. Why don't they just mandate a 3-per mil alcohol level in the blood then? Oxygen pumped in technically intoxicates the people too, in the sense that they make decisions differently from how they would in normal conditions
Have fun with the wall of text.