think of this, to a professional gambler, gambling is nothing more than a job. they dont play for fun, they play to win and make money so they can maintain their lifestyle.
and also most of them became a millionaire from their main job as a professional gambler and live with a glamorous lifestyle
How many of them (professional gamblers who become millionaires from gambling) you have seen personally? I don't think they are even 2 to 3% of total gamblers. In gambling most of the people lose money and do not trust on those casinos advertise saying professional gamblers has won so many millions and all. Those may be just advertising strategy to trap new people into gambling.