I'm afraid I don't quite understand you.
You think gambling is not a scam and people get paid out or?
Maybe he is believing that gambling is a scam or not literally gambling but there are some gambling sites that are trying to scam gamblers. But I rarely see this type of case. He's using the word literally "gambling" as there's a need to point out what specific meaning as activity, industry, or website/casino.
those kind of bad actions and I believe if we will be active of sharing our observation as well we can help others not to be victims.