If we have this kind of mindset that we can't beat the casino then there's no point for us to spend sometime playing especially if we know that we will lose at the end.
That works only for those who see casino only as an opportunity to earn.
However I think people dont fully realize what "beating casino" means. They think that beat casino = win, win frequently, earn. Which is quite possible. People do win, some even end with profit against casino, some even manage to win frequently. What I think, that beating a casino means winning all the money it has. Which is impossible to do. Winning jackpot does not mean that casino will turn bankrupt.