Gambling can never be a form of earning. It can be treated as a form of entertainment or socializing, but never as a job or career.
When I was reading what can lead to gambling addiction, one of the reasons is because addicts do not have a good source of income while some is as a result of seeing gambling as an alternative ways or even the main way to earn money, but this is wrong, gambling should just be for the fun of it as we always say on this forum.
Gambling responsibly, in my opinion is the duty of the gambler. It is not right to blame the casino for that. For every gambler who gets addicted and play irresponsibly, there will be 20 others who will be doing that in a responsible manner.
According to an article I read a long time ago in 2019, I read out of 100% of people that are gambling, that 20% are likely to be addicted, which means 1:5 as against to 1:20.
Because the reach people have good source of earning, they do not rely on gambling at all not to talk of getting addicted if compared to average people.