Meiri (Pesachim 66a): Whoever is appointed, as community leader should strive with all this strength to lead properly according to the position which has been given to him. If he is appointed to be the religious leader of his generation concerning Torah and divine issues, it is necessary that he be complete and erudite in all matters related to deciding halacha and that he knows how to reply to everyone who comes to challenge religion. However, if he recognizes in himself that he doesn’t have the abilities in these areas, it is praiseworthy that he should not be embarrassed to let go of his status and to give the position to one who is competent. … . However, even though a person is knowledgeable and can reply to every challenge, it is best not to rely entirely on logical proofs but rather on commonsense or tradition. That is because everything which is based simply on logical proofs provides an opening to refutation… Thus, the Yerushalmi says that even though Hillel spent the entire day providing logical derivations of the Halacha, his views were only accepted and he was appointed leader when he said that the Halacha was a tradition that he had learned from his teachers Shemaya and Avtalyon… Furthermore even though the leader is an expert and knows how to respond to all challenges and is accepted as the authority, he should not answer in a confrontational manner and act in a domineering way but should speak pleasantly and humbly. If he does act arrogantly, he will be punished and debased because of it.