Some people like to play casino games for the reason of looking for entertainment while some other is just for a past time. And even some other people would rather like to play slot games than playing online roulette. It all depends on the taste of a certain person. People have their own wants and needs.
With so many reasons why people choose to play a certain game on a casino, the only thing which is true is that they keep on playing because they are having fun. We are not in the position to judge them as well as to criticize them because they are not doing anything wrong against anyone of us. Let them play for as long as they want. For as long as you are not affected, do not say a single word about them. And besides, it’s their life and not yours and you don’t have to bother at all.