Carlos Quintana is willing to fight, why wasn't Williams?

These 2 fighters have met a total of 2 times. The first fight ended in a Quintana victory, the second ended in a Williams victory. Quintana vs. Williams I In their first meeting, Williams was completely dominated by Quintana, a 6-to-1 underdog, for 12 rounds. Carlos out thought, out skilled, out boxed the much bigger and stronger Williams. Quintana showed what true boxing ability can over come that night. Quintana vs. Williams II In their second meeting, Quintana was completely dominated by Williams as Paul used his physical advantages such as his strength and size to pressure Carlos landing big combinations taking Quintana out in the first round. Williams showed what true pressure coupled with power and strength can do that night. Now, both fighters are 1 and 1 against each other. Why not a 3rd? According to this poll I created, a fighter winning on skill, intelligence and boxing ability is more impressive than a fight who's physical advantages serve him more. http://www.boxingscene.com/forums/poll.php?do=showresults&pollid=16241 So if Quintana's victory was more impressive? Shouldn't that indicate that a rubber match is needed? Assuming Williams gets past Wright? Paul claims no one wants to fight him, yet the guy who, according to this forum, beat him more impressively than PWill did to him wants to fight and Willy aint even lookin his way.