It very well could be. Randy is said to currently have a lot of pull with Vince.
Over the years wrestlers have hid their injuries to keep working to keep their spot. Wrestlers like HBK and the Undertaker would continue to work over the years hurt to finish their program/feud, then take some time off, but Kennedy never comes back long enough to work a full angle. I am not saying what is right or wrong by none, but just relaying how I interpret, just a possibility, how it may be in that business climate.
It could be as simple as Orton and gang saying they will not work with Kennedy and Vince
having no choice in the matter.