One thing that has never been verified but I suspected was I really believe the Joneses liked Romo a lot and his health came first.
I said at the time, I hope they do not let him compete. He'd lost that advantage of avoiding tacklers and I thought it was a when not if on another injury. I was really tired of seeing him on the turf. He would, admirably, sacrifice his body to make a play but that eventually caught up to him.
They let him in on that last game out of respect but if he'd taken a really hard hit, he would have been out of there.