I don't understand why anyone would participate in gambling if the prize is not guaranteed. But that's what the cameras want. After all, what's the point of promising someone a prize if you can say there is a chance to win a prize? And then everyone will participate, even if most of them end up without a prize.
I don`t understand why we play games if the win is not guaranteed. I think that we can say it about any hobby and even any occupation. But even if we imagine that we always win/get maximum result/etc - it would be very dull life without any interest and without reasons to grow up and level up skills.