Joe Hogan isn't scared to talk to Cyborg, that's not his way, he'll talk to anyone. He knows how to handle himself like a pro inside the octagon, when he is doing that job.
Joe is also at the point in his commentating career where he's put in enough time in the UFC, if he wants to take off for his daughter's birthday, bless him, he's earned it. The UFC has enough commentators-in-training hanging around, I'm sure they don't care.