Why do Obierika and Okonkwo differ on their opinion of the ozo title?

Obierika questions authority and blind loyalty to practices like the "Ozo Title" Okonkwo became offended by Obierika’s joking saying “‘I think it is good that our clan holds the ozo title in high esteem […] In those other clans you speak of, ozo is so low that every beggar takes it’’ Okonkwo defines himself through rituals like the OZO Title while Obierika does not.