I am on the fence about that rule.. Having received an injury years ago that left me with 29% disability in my shooting hand I know first hand how a disability can affect your level of play. Having received quite a bit of nerve and tendon damage I have found that humidity....temperature....and how much strain I put on my hand at work on amy particular day can affect my level of play greatly from one day to the next.
On the other hand I believe the handicapping system works pretty good and if some one has an ailment that affects their level of play the handicapping system would adjust their skill level accordingly over a period of time.
Agreed... I has the misfortune of playing him and he actually bragged about it. I am a pretty good 7. He spanked me. I literally had 3 shots during the whole match. I lost that 19 - 1. My worst loss in years.