what do you think?. Do you believe he is right with the rigid approach to gambling?, also should I continue convincing him to try out something new and enjoy these great offers?.
If your friend does not want to try a new casino, then there's no point forcing him. Some persons are averse to change, so you should let him be.
Trying a new casino will not increase his chances of winning, and neither will it make him to be addicted to gambling. What it does is that, it exposes him to cool features and incentives that may be lacking in the casino and gives him the opportunity to compare and contrast.
True, there are quite a few reasons that are one of the things that make them not want to switch to another casino, and one of them may be that they are already very much in the casino that they have chosen before, of course there is a certain trust and satisfaction that is not felt by others, and I think you will only be able to teach them to switch to another casino when the casino you are promoting makes them feel more interested in everything.
But of course all of that is beyond the issue of winning and losing, I mean like you said that switching to another casino has absolutely nothing to do with the possibility of increasing winnings, in the end it still remains that wherever you play if you are unlucky then you are bound to lose a certain amount because after all the name of the casino or gambling is always about winning and losing which is always unknowable and because there is no certainty whatsoever that can guarantee you especially to win. And on the other hand you can't just conclude that they won't get addicted because addiction is another matter, what I mean is that no matter where you play, the possibility of addiction can't always be avoided completely.