This has been discussed Ad nauseam. If the casino made roulette an absolutely even game where everything was equal and they had no edge the casino would still end up winning because people bet their winnings over and over till they're gone. The casinos edge is just over 2% or just over 5% depending on single or double zero but their hold is always 16 or 17%. That's because people rebet their winnings they don't just get ahead and walk away and they would do the same thing if the casino had no edge. You certainly know very little about a game that you supposedly are involved in every day.