I doubt it is more about the profit in gambling, some people I know just gamble to spend their spare time but other gamblers usually play to make money. It depends on the person's perspective but the same end is expected for both category people. My opinion is the rich gamblers are less than other types of gamblers.
Gambling will earn you profits and also losses, the targets is make sure the profits exceeds heavily more than the losses recorded. Some gamble to make a living, while others bet for pleasure and hope for some extra cash in their pockets. Gambling is inadmissible and depending on it for survival is not an appealing prospect. We all have different motives for gambling and what we become of those who participate in the gambling system. I have a high paying occupation; engaging in gambling does not imply or send a direct message that I rely on the system to make a living; I gamble in my leisure time and with free money, never using allocated cash.