The issue of checklists is an interesting one. If the incapacitation was to be the only abnormal situation, then I would agree that most pilots would probably prefer to continue without assistance, and completion of the normal checklists is no big deal.
However, if the incapacitation was in conjunction with another abnormal situation, lets say a fumes event or decompression which led to the incapacitation, then what? What about a fire or structural damage?
If abnormal checklists come into play, and depending on which checklist is required and which systems may no longer be operable, then I would absolutely seek any assistance which was available. I can't contemplate attempting to run an electrical emergency checklist whilst hand-flying the a/c on minimal instrumentation - it's hard enough with 2 pilots.
I know this in itself opens a further can of worms. How obvious is the location of the required system selectors/switches/instrumentation to a non-rated pilot, or CC member? Can you be certain that the correct selection will be made?
It's a tricky one to call, but I guess it has to come down to making a judgement on which course of action carries the least amount of risk.