Gambling, alcohol, and gacha games are clearly addictive and frequently are not set up to be in the best interests of the users.
There are billions of casual drinkers / gamblers / gamers who do not show any sign of addiction. I’m really tired to hear the same nonsense repeated again and again. Do a pyschology study of any casino employee that spends 40 hours a week in a gaming venue, or any manufacturer of gaming devices that professionally play games 40 hours a week, and none of these employees exposed to so much gambling / drinking are addicted.
Psychology studies have not established that these items are “addictive”, because if they were, they would be banned all over the world. Nowhere in the western world are they banned, ghey are regulated for “fairness”. There are some individuals that throw the word addiction around without justification, please dont be one of them.
https://www.niaaa.nih.gov/publications/cycle-alcohol-addicti...
You also basically observed that the people selling the addictive thing don't get addicted, which is sort of obvious. You don't get addicted by being near e.g. alcohol and providing it to others. You get addicted by regularly drinking it.
Scientific studies have established nicotine is addictive yet purchase and smoking of cigarettes is legal in most countries.
Those two types of content are about the cheapest TV to produce. Per second of video produced (counting all the unpopular content), short videos might be more expensive, but the costs are very distributed.