gambling can never fix your life but can wreck it 
also can have no effect play wisely if you are addicted
also can have no effect play wisely if you are addicted Gambling is fixing someones life's; just look casino's owners
Yes that's true but its also very possible that a high roller can clean out a casino and make it go bankrupt. It happens all the time with small casinos. Its risky for them also.
With a good bankroll management (according to Kelly formula, if the house edge is 1%, the max profit per game should be set as 1% of total bankroll), it is very unlikely for the house to lose significant amount.