H worked up some more of his famous statistics which he explained to me in dizzying detail. I nodded polite interest (I really think he's full of hooey on this whole "pattern" thing, as well as on so many other things.)
You are correct. Unless he's a card counter playing 21, there's no way to "cheat" at gambling - it's pure statistical chance. The odds are what they are.
(And I believe most of the casinos instituted methods to counteract card counters at the 21 tables).