OP, every gambler that is placing his bet on a match is expecting to win and that was ahy he decided to gamble, and it is the same reason that makes gamblers to stake high amount of money because they feel it is a sure bet.
However, wins that you get based on let me gamble for fun and you think the house edge will win you as usual but you ended up making profit will make you feel excited because that was not the plan. This is the reason why one should gamble for fun, so that you don't expect winning annd if it turns out to be a win, you will enjoy the fun more.