You're absolutely correct about the unpredictability of events in gambling. So, it's also with real life issues. But let's say, for the purpose of discuss, that you're to make a bet on athletics where you've mismatched athletes of physically challenged runners without aid. In that pack you've one able bodied runner without any form of deformity. Wouldn't it be very safe to bet on them as your winner? Of course, you would. I guess that's how gamblers view events and see predictability in games because they tend to visualize them from their inner eyes. I may be wrong but that's how I rate it.