cause everyone is greedy, they wanna make easy money with fun, so people prefer making money in this way, but most people failed because casinos have house edges, we lose in the long run, so we should stop when we earn, although it is difficult for us
The fact that the concept of gambling is simple and not hard to understand and the fact that you can make money with it is enough for people to get addicted to it.
Even tho they lose sometimes they still believe that they will win and get there lost money back.