I think that the biggest problem at the beginning of addiction is lack of money, every addict will always need money and that is what produces the different problems, when a person has enough money, like millionaires, they play until they get bored, they don't even like it. It doesn't matter if they win or lose, for them it doesn't matter, you rarely see a millionaire enter a casino, that is almost unheard of, but people who are not millionaires do, and it is because of the lack of money, in this aspect we are people who almost always see things from the point of view that must be corrected quickly. If a person is already addicted, my advice will always be to seek professional help, which is normal, of course. The rest is at the discretion of the person.
The goal of most people gambling is indeed to get a win to improve their financial situation. But with this kind of gambling goal, it will usually become a problem when the gambling they do ends in disappointment. But for people who do have money and gamble, maybe they will not have a problem when the gambling they do ends in defeat is also not a problem, but it does not rule out the possibility that they will also experience problems even though they have enough money. It's true what you said, maybe there are rarely millionaires who enter the casino to find entertainment, because in my opinion if they are looking for entertainment, of course gambling is not the only thing that can be done, there are many other things that can be done.
For beginners who gamble, I think they should never think that gambling is something that can help their finances, because that is a wrong assumption. It is better to gamble reasonably so as not to get addicted because if you are addicted it will be very difficult to be able to fix it even with the help of professionals.