Yes, you are spot on.
The casino basically sells hope, and charges a lot for it.
In the end, the gamblers usually would have gotten a much better future if they invested their money instead of gambling it away.
But that's the high they get, the probability to win a lot of money in a short amount of time. Even though at the end of the day most gamblers will lose it all.
It's all because people are tempted to make money quickly through gambling so they forget or don't realize that they will only lose their money. And if gamblers can find other ways to make money, they can get it and you are giving them good advice by investing their money rather than risking it.
And only some people are willing to look for other ways to make money. Most people will continue to use gambling to make money even if they have failed many times. After experiencing loss, instead of realizing it, they become emotional and cannot accept their loss.