CTLaw – “your hypothetical narishkeit”
Is there really no reasonable prospect of the Rov having a medical emergency on Erev Pessach (himself or is family)? Is there no risk of the Rov getting into an accident? Is it improbable that the Rov will need to deal with a crisis in his community (even a death)?
Why do you think it is a narishkeit that the Rov will be unable to sell the chometz before the zman?
In fact, on the balance of probability, I wouldn’t be surprised if, over the many generations of our history, such circumstance actually did occur!
Which is why I personally appoint more than one Rov to sell my chometz – just in case.