This is what Hendo reacted to the case:
Please just check that line were he says "I also want to thank Dana and Lorenzo for being so understanding and supportive"
Why does he have to thank them for being SO UNDERSTANDING? Isn't it a knee injury? That forces him out, and that doesn't need from the other side UNDERSTANDING, its an INJURY!!!!
I think that HENDO knew he is going to waste his career and get TFKO 100% sure.
Haha talk about out on a limb. I'm sure if you take into the account the context of injuries lately and the scale of the fight you can understand that he is most likely acknowledging that he understands the repercussions of his dropping out and the magnitude of it.