To be honest, I haven't read every single post in this section, but from what I have seen, people seem to love gambling, even if they loose.
There's a ton of gamblers online because the minimum bet is lower than an irl casino and you don't have to spend a dollar to win big. Others become addicted because they have too much time on their hands and couldn't get a hold of themselves whenever they start losing.
They aren't addicts, if they were then you won't see them on forum more often. Most of them are just pretenders and many of them are only here to meet their post count.
I agree most of the time you'll see them on a gambling site's chatbox and sometimes brag about their winning/losing bets.
A little bit of gambling is okay but when you do it with the hope of making money it becomes a problem.
Also the top casinos write to "play responsibly".
Also some casinos even have their own self exclusion feature.