Hi Maxwell.
I am in no way a "blind fan" who wishes to "feed SH's ego", as you suggest.
I am a reasonably well educated adult with very strong opinions of my own who has little interest in "saying the right thing" or appeasing the ego of anyone.
But my totally honest opinion is that SH does not go on stage "under-reheasred", and the live sets that I have seen are superb and would back up the opinion that whatever amount of rehearsing SH does or does not do, it is appropriate. If he makes a spontaneous decision to add to or take away from the set list at the last minute, then surely that is the sign of a consumate professional?