Unfortunately that is the harsh reality.Even gamblers who have got their maximum prize like x100.000 or higher jackpot wins they say that in total they are on the red because of them playing in a continuous way.If anyone plays every day then it is impossible to not lose on slot machines because they have been programmed to take people money but in a slow way,they don't get all your money in the fastest way possible,they keep you playing deceiving you that now you may got a win and then all of a sudden you see yourself in red and 0 balance.
Yeah, and also the fact that gamblers usually won't share any of their losses, they simply forget about them, but every time they win, they will broadcast to everyone, so that they look good.
In the end, it's kinda like paying for a service, gamblers are paying for the ability to brag that they won in certain occasions. The truth is that they also lost, but people don't have to know that.