I agree with you. There was a time I read about some celebrities which are musicians owing casinos some huge amount of money. The casino do allow them to gamble on debt because they know that they have a means of paying back the funds. Addiction doesn't care if you are a rich guy or not, if you gamble without control, you will get addicted.
In this example it is easier for wealthy musicians to get into debt because the casino offers them a high credit limit knowing they might have big money. Celebrities keep playing because they know they might have large fees coming in the future which they can use to cover their losses. But not everyone has such opportunities and not everyone can deal with their debts. If someone gets too carried away with gambling because no matter how rich you are every person has a critical limit where they can no longer cope either with the game or with debts.