Indeed there are people who are lucky because of gambling and usually through lotteries, but the number of lucky people cannot be compared to the number of the unlucky one, it's unbalanced. After all, how much time and money they have spent before they get such fortune.
I don't think that people who won big prizes in lottery actually spent a lot on buying lottery tickets. I've read several stories about those winners and not even one of them mentioned big amount of tickets bought. Winning jackpot in lottery is pure luck, and if someone is trying to increase his/her chances by buying more tickets, they are just throwing away their money, that's all. And this is a good thing because otherwise people would be incited to buy more tickets, and we'd have much more addicted gamblers than we currently have.