Well in sports its not a one and done situation. If they lose a game they have other games that they can win. If it was a one and done situation then more time to prepare might be warrented. As for Chael of course he accepted the fight, this is his MO. Get a fight I dont really deserve and get a payday to lose to a far superior fighter.
Honestly my two cents is that Jon didnt want to put another huge check in Chael's pocket that he didnt earn. I am not mad at all at how this played out. Chael doesn't deserve it and fighting him and winning does nothing for Jon.
I against I,
flesh of my flesh,
and mind of my mind,
two of a kind but one won't survive,
my images reflect in the enemies eye,
and his images reflect in mine the same time
MosDef " I against I"