Demeanor is just as important as material.
A daily middle school choir and a once-a-week unauditioned community choir might need a lot of the same things. Similar feedback, similar teaching/mentoring, even similar literature. They don’t need the same demeanor from the conductor.
Indeed, if you approached a choir of adults the way you approached a choir of tweens and teens, you probably wouldn’t last long in front of that choir. They would just not be receptive to your approach.
You can know the material thoroughly, but unless you deliver it in a way that the chorus will receive it, you will fail. It’s one of the biggest challenges conductors face when moving from one age or experience-level to another.