Successful gamblers have to examine any bets they make in light of the odds really being even money.
Even money bets do not mean that the bettor can't lose, like betting red or black on roulette. The presence of the green 0, and even the 00, means that statistically the bettor will lose more than 50% of the time. There are variations of the game that offer en prison on 37 number tables so if a 0 is rolled, the bettor neither wins or loses but his or her bet rides again on the next roll; if the bet-upon event occurs on the second spin, the even-money wager is returned to the bettor. There still is not a 50-50 chance of winning, but a lot closer, since the house edge is reduced by almost 50%.