I'll try to get you to understand this again. We each have the ability to make an educated estimation of each of our guy's chances of, say, making it to the finals. After all, I would hope you're willing to acknowledge that the chances of the #1 seed winning his bracket is higher than the #10 seed. Unless you are incapable or unwilling to place a % on everybody's chances, then, given an individual's opinion we can then use pure math to compute the odds of a series of events happening.
So if crhawkwrestling thinks Gilman has an 80% chance of making it to the finals, Clark has a 70% chance, and Sorenson has a 70% chance, we can then state that, if crhawk is correct, there is a 40% chance that all three make it to the finals. If he then thinks there's an 80% chance that either Brooks or Burak will make it to the finals, then based on his own opinion there is about a 32% chance that we have four wrestlers in the finals.
I'm not saying crhawk can accurately predict the odds. I'm saying that if he makes his own best guess on each individual accomplishment, the math will then show that the odds of everything falling into place will be remote.