@Solosanz tells true words. It call "shit happens". And in my post it is called"risk management". In my strategy win rate is about 60% and it is enough to get stable profit. 40% of loses i can call "shit happens". No one can get 100% win rate - it is sport and it can`t be fully predictable. But we can calculate odds and risks before betting.
Everything is possible in the game, but you can predict the ideal situation(and stats tell us that it wins rather often), and in the casino games you can predict nothing.
Only sports betting we have predictions and such is likely to happened, in casino games it's not predictions as you wouldn't know what the results would be while playing the games, but of course we know it's gambling and you don't know the exact out of the game or events but if in a way you predicted and you happen to secure winning in your strategies that doesn't connotes you are an expert who always guess correctly or even predicted correctly always and win. Today there are people whom their strategy usually gives about 70-80 percent win but sometimes with just an eye blink they entirely sweep off their account with the sole purpose of relying on their strategies. Do not quote me wrongly but what I am trying to say is that even though you are having such winning in your strategy there are every tendency to lose them because gambling is game of luck and chances.
And again - it can be called "shit happens". But if you good in analyze, money management, have a strategy, you will get profit on a long distance. Several month i`ve got stable profit. I`ve got few times negative week balance, but every month was profitable. You can`t lose all the time, with 50+% winrate you must make a bet not more than 10% of bankroll, or, better, even 5%. If analyze ok - it would be enough for my odds and my strategy. Everybody calculates his strategy and numbers himself of course. It is just example that true for me.
PS. Maths says that it is possible to lose even in such way. But real life tell us that it is unreal situation.