Of course that's true, because the chances are very slim that we can succeed by gambling. Even if we intend to get rich by gambling we can already look rich when we realize the finances that have been lost in gambling with not a small amount. But most people make the wrong assumption so that they can be successful by gambling like the people out there, even though it's not because they are good or great at gambling just because they are lucky. Without the self-awareness they feel so they make gambling their main income. Of course this is wrong, because as you said gambling is not a place to make money but a place to spend money because basically gambling is created for entertainment with paid games and of course there will be losing and winning, but it is certain that the player will only experience a lot of defeat unlike the bookie as a home pour that will definitely always win.
Gambling is a place to have fun, but to get that pleasure, we have to spend a certain amount of money, and gamblers often spend a lot of money to get that pleasure. They are willing to spend a lot of money on gambling because they see that there is a prize that they can get, so they keep trying to gamble even though it could cost them all their money. They should be able to realize after seeing the amount of money they spend gambling and be able to think that if that large amount of money is used to create a business, they will have the opportunity to make money and the money they use will not be in vain because they can have other sources of income that can give them money. And if they can start making money from their business, they can see that gambling cannot make money too often because we are bound to lose. Meanwhile, if they create a business, they can make money and if the business becomes big, that means their earning potential can increase so they can continue to make money from the business. And that's different from gambling, where they think they can make money from gambling.