I think example of casino games like blackjack and poker, using optimal strategies can improve a player's chances of winning in the short term, but the house edge still applies over the long term. In roulette, players can make bets with different odds, but the payout ratios are structured in such a way that the house always wins over time.While it is possible for some skilled players to win consistently over time, this is rare and requires a deep understanding of the game and a lot of practice. In general, the casino will always have the advantage, and odds and strategies cannot change this fundamental fact.