I do agree with you but since capitalist made gambling a business thus, the so called gambling industry, gambling is not just for amusement alone and indeed it is for profit. Though it depends on the mind set of a person playing the gambling games. As some are in for entertainment, they do not care if they lose or not, while majority were after booking a win but failed miserably leaving them broke and others were just taking the opportunity of having fun while having a chance to win. Either way, we must set a limit to ourselves because everything that is too much is bad not only with ourselves but also to people around us.