I think for ordinary players it is difficult to get win after win at the casino or make money from gambling because of the limitations they have so it will be very different from the whales. But it's a different story if ordinary players can get luck that will come suddenly so that it can help them get big wins. Therefore, it is better for ordinary players not to depend too much on gambling and expect too much to make money from gambling because it will be difficult. Maybe they just need to play gambling for fun because maybe luck will come to those who don't have a goal to make money from gambling.
Gambling for fun is the right attitude to have as gambling for money is surely to end bad for the majority of gamblers that try it, however even then luck may not be on your side, the truth is that there is not really a reason behind why some people are lucky and some are not, some people try to explain this with superstitious beliefs but there is not any explanation for that, someone eventually was supposed to get lucky and it could happen to a person gambling for fun or for money.
As some people come to gambling, they want to win all the time which is not supportable. Here some will win and some will lose can be called the natural religion. Gambling with the intense hope of winning something is the ultimate folly. It depends on luck so people won't win as much as they want. Patience and controlled gambling play a relatively important role in bringing success.