I will agree with you that it is the poor gamblers that are seen as irresponsible gamblers because they dont have any funds to fall back at when they run at big loss. You will see them looking for someone to fet a loan from to satisfy their gambling urge and to also chase their losses. When it comes to addiction and self-discipline these applies to both a poor and a rich gambler because if you are an addicted gambler,you will end up in excessive loss that will affect your financial bouyance. Set a time limit for your gambling activities and stop when it is time to stop,and only game with funds that you cam afford to lose,so that you don't start chasing your losses.
Your statement that poor gamblers are seen as irresponsible gamblers is not entirely true. By the way, what is your definition of a poor gambler?
Those who gamble irresponsibly are from all walks of life and are in all strata of the economic ladder.
A typical example of an irresponsible gambler is Drake. He's rich, a successful musical artist but we can all agree that he gambles irresponsibly. Never have we heard that he loaned money to satisfy his gambling urge but we have seen go on a betting spree despite losing a lot of money. I consider it irresponsible gambling.