I heard the brother also say that he would play Slots all day. They are the worst payout at the casino. Even if he meant video poker you don’t consistently win at that. Far from it. The only game that sometimes sees the Casino get beat is Baccarat and that’s only occasionally.
Blackjack - years ago I knew a kid who would go down to the islands - play blackjack just enough to cover his ticket, pay his tuition and some of his rent. He knew he couldn’t get greedy or they’d spot him and ban him... no one plays big time and wins for 20 years. Gambling’s a cover story...