like the original post assumes (which I recognize isn't reality) then it would be. The original post stated 20% odds given those assumptions whereas it should be more like 80% odds.
In reality, however, the odds of a conference w/ a 9 game conference schedule and no CCG are worse at making the playoffs than a conference w/ an 8 game conference schedule plus a CCG. Having a 9 game conference schedule and a CCG (like the Pac-12 currently does) would put you somewhere between the 2.