If you are addicted to gambling, what chess has to do with it? It's not a gambling sport, game.
Unrated games are very useful if you want to explore, train, etc.. You have less pressure without rating and also you just concentrating on a single task , which is improving and not worry about things like loosing on time or rating points etc.
Do you find unrated games boring?
I do. Does that mean I'm addicted to gambling? Why do you play chess, for the enjoyment of the game itself, or the scoring mechanism and feeling of progress?