I completely agree that he is different in terms of strength than most people. But from my experience working with disc issues with athletes who were comparatively strong, that with ACUTE disc issues, very similar approaches would initially need to be taken across the board. Also, the compressive forces on the disc from birddogs and similar exercises (which I recommended if it was an acute disc issue) would not nearly be as high as a loaded standing exercise. I do agree though that if somebody was going to be pressing, I'd rather than be standing than sitting to decrease disc/spinal pressure and loading.
The big thing is that the OP still hasn't answered many of the questions (what type of doc he saw, what the official diagnosis was, what MRI results showed, other pathologies associated, etc) and we just found out the history of his injury. 11 months was the first injury where he was injured in an extremely submaximal load (185lb warmup on front squat). That shows that at that time he had some glaring pathology (whether it be an imbalance, inhibition, etc). He didn't mention any radicular symptoms, so there may have been no disc injury at that time. Then 9 weeks ago, he (re)injured his low back deadlifting and had radicular symptoms, which most likely points to disc (especially since the epidurals have helped). Knowing this, I would definitely say at this point it is okay for him to begin to progress to some higher loaded exercises (push press, etc) as long as they do not exasperate symptoms. But still, I would be CAUTIOUS of pushing things too fast, even if symptoms do not resurface, as it takes time for the disc to scar over and you do not want to overstress the discs until they have had a chance to shrink, heal, and scar over.
So am I saying not to do those exercises - no. He is past that acute stage and already begun to progress with the assistance of ESI's, so as long as he is intellegent about it. I think the initially questioning of the exercise came from a lack of information (history, etc).
The "strong back" information I presented was to make sure that the OP understood the information I presented since he said his doctor had stated "The stronger i make it the better off i will be. I was told by my doctor that having a strong bad back that is still able to lift things is better than having a weak bad back that can lift and do nothing." I completely agree that multiple opinions should be taken before going under the knife. I honestly feel that the majority of disc injuries (minus those extreme bulges in size of 12+ mm) can be corrected and handled with proper therapy, rehab, and conservative treatment.