They can show a guy who won 100k from a jackpot and make you want to gamble yourself as well for a chance to be that person, but do not show the tens of thousands of people who keep the gambling world alive. I believe that you should gamble, but with the idea that you will lose that money on your mind when you do.
This is their business marketing strategy that they will always show you big wins but that doesn't mean they are fake and if you take it too seriously and bet aggressively in hope of earning lot of profits same to that then you can loose the amount which is wrong.So always bet in your limits and if you are lucky small bets of $1 or even lower can turn into big amount with high multipliers.So don't get away with these things and have self control in gambling which will keep you alive financially.