We learn how to play it online from streamers; the same thing is also a bit applicable with those who are streaming casino games. Streamers find love in it based on how the streamers display winning all the time; even if full tips on how to win the game are not being displayed, they still find a means to convince themselves to try the game anyway.
Many people have became an addictive gamblers because they make it an important activity they can not do without so they can keep trying luck, making money for themselves. Caution need to be taken while we try to make money from gambling.
Streamers are really just that doing their job on which making up some marketing and exposure into the site or platform that they are working with. Are they fueling up the addiction? No. You are the ones who do make out decisions on trying out to make out some deposit on a certain site and decide to play gambling not them. It is on personal choice whether the would be playing or not. If you cant be able to control yourself on spending then better not to play gambling at all from the beginning.