He isn't getting it because according to news sources, they're using the Eddie Guerrero storyline, and Randy Orton beating Rey Mysterio at No Way Out to make Randy get more over as a heel. They also believe that Orton vs. Angle is the way to go for the Wrestlemania mainevent.
Said it all. They also believe that while Rey is popular that after a few weeks it will become too unbelievable to put him in matches with the much bigger superstars.