'You don't step into the ring with Ali because you think you can box.
The Clan is the original unit of social organization for the people of The Known World. Humanti society is becoming more diverse. The Guild or professional organization is taking the fore in the Known World. Except on the Sea.
Nearly every primitive culture has had rituals and celebrations to guarantee the proper passage of the seasons and to ensure the fertility of crops and animals. Oversight of these ceremonies was generally the provenance of local kings or priests.
Suppose that the adventurers dispatch one of these fellows. The local peasants may become hysterical, fearing famine and death will stalk the land. Alternatively, they may want one of the new heroes to become king. For a while, this can be a good thing, but the first time that the crops fail, the superstitious locals will want to sacrifice their new leader.