I am giving the advice because the chances of getting addicted are higher for someone who plays every game in a casino than for someone who plays a particular game. There is no study to support this, just my assumptions.
What do you think?
It should be the other way round because you get addicted to something you do repeatedly. Assuming you play multiple games there should be less chance of you getting addicted to one but when it's only one game that you play all the time, you're definitely going to get addicted and it's just a matter of time before the addiction becomes uncontrollable. This can defer though depending on the person we're talking about but I believe on a large scale, those that gamble on one particular type of games are the ones that get addicted more.
You know that someone can also get addicted to trying many things; that is an addiction of not taking to one option. That can also be a problem.
I would like to use womanizing as a close example to gambling because it falls under habits to be avoided. Your decision to not stick to one woman may be a huge financial mistake. The same thing goes for your decision to not stick to one game; it can also be a huge financial mistake because you will need a bigger gambling budget to be able to play all the games.
Trying to playing many gambling games in a long term can make someone deeper in gambling. They will not stop from playing gambling because they think they will win in the other gambling games. But if they can think much, they will not see the big chance to win but only will lose their money. Only limiting themselves in gambling can help them to avoid the addiction but that need a strong mind to control themselves. Playing one gambling games can indeed make them addicted without take a long time. So we should care to ourselves and always be careful when gambling.