The player doesn't have to bet on every proposition. The house can't pass.
Funny things can happen on the way to the betting window.
Better read this. I.Q. Fewer than 1 in 50 sports bettors can pass this test. No, you're not. There are key differences between successful sports bettors and smoke-blowers. I don't know what you do for a living nor do I know what your favorite hobby might be, but chances are there is something at which you are very, very good.