Honestly, it rarely makes sense.
How do you look at it what was the point of everyone following charname in the first BG? We came across much more experienced travelers pretty quickly (at least on paper).
Aside from a few characters, most characters really have no reason to listen to the player.
The same can be said for Hawke.
Why also are we in charge of the DAO when Alistair is a more experienced warden? The game is trying to explain it, but it's pretty cheap.
I could still try to cite the first act of DAI (I know there are no acts, but not important) why is Cassandra allowing us to command?