They conclude that their strategy is indeed successful, and even if they try it again in the next round, it won't necessarily result in a win, right?
Most gamblers try the same betting pattern and win before, only to lose again. There's no perfect strategy. Luck is definitely a key factor in winning.
Perhaps the strategy involves managing the bet amount. Sometimes gamblers bet the same amount, even the smallest bet, until the game ends. Others try to increase their bets after a few rounds.
Every gambler has their own unique way of betting. They do it for themselves, and it certainly boosts their confidence.