Toil yielding unexpected 'Answer'
The simple fact of the matter is that Iverson could not be Iverson forever. Standing on his tiptoes, he might be 6-feet even. He weighs 165 pounds if you take his jewelry into account. There was only so much punishment his body could take. There was a finite number of drives to the hoop any one human being could possibly make and continue to get back up with the same vigor and enthusiasm to remain effective.
The problem, now, though, is that that number might have passed.