I saw someone say recently "hobbies are a luxury" and I tend to agree.
Think back decades ago and you had a single person or a family supported by a single income who could afford the rent or to buy their house and put their kids through college.
By the late 1970s and 1980s the balance had shifted to where more households than not had both parents working.
Then people started having multiple jobs. This was in part because employers didn't want to employ people full-time as they'd have to offer benefits, most notably health insurance.
And the last 10+ years has taken this further where we now have "side gigs" or "side hustles" or people who are desperate to be "influencers" or "Youtubers" or whatever. Any hobby you have needs to be monetized to get by. You have to sell something, even if it's advice on how to do the thing.
That's what's meant by "hobbies are a luxury". It means you're earning enough not to need to monetize some portion of your life. And the number of people who can do that is continually decreasing.
The problem is capitalism. If you have a hobby, the capital owners haven't loaded you with enough debt (student, medical, housing). You're too independent. You may do unacceptable things like demand raises and better working conditions or, worse yet, withhold your labor. You're spending at least some of your time not creating value for some capital owner to exploit.
Every aspect of our lives is getting financialized so somebody else can get wealthier. Every second of your time and thing you do needs to be monetized and exploited.
Gambling isn't a net negative for society. It's just a negative. There are no positive aspects to it. Gambling addicts are incredibly likely to commit suicide. It's incredibly destructive.