Rich ppl get addicted to gambling & poor ppl get addicted to gambling. Rich ppl put higher bets than poor ppl because they've got the money but poor ppl can't so they'll gamble according to their finance. Rich or poor they shouldn't gamble.
The truth is that there's no body that can not be addicted to gambling but the poor who are more devoted to gambling are the once being easily addicted more than the rich who are only few in numbers that are dedicated to gambling. Another thing is that many rich people are more self controlled than the more who are bent on making a living from gambling.
Based on the last statement you made, are you advising people not to gamble? If that's a yes, then why?
for most people it's probably better to avoid gambling completely because they'll lack the skills for learning when to stop and for managing bankroll
gambling for most will just end up being a way to slowly (or really fast for some) transfer their money to the house
poor people get more hooked on the dream of making a lot of money
have you read the razor's edge by W. Somerset Maugham?
it's an interesting book regarding what we really need in life and about life being about more things than money only.