Have to agree with Lang on this one. Unless you have a leader as a guard more than a leader. The group is just as qualified to talk to the player as any other . Unless they don’t want to represent the group or they need someone to answer specific questions.
This common practice in gaming to have leaders do everything and no other npc has a brain to be an individual is because it make game design easier for programmers and plot. Since we have no express plot. Anyone can cross weave a story. NPCs can do different things without care of a group or much care.
Besides. I think the trope is silly when the entire game revolves around the player character. Only due to engine limitations would you see stuff like this. Well, unless stuff isn’t programmed yet I suppose.