Just because our character is powerful doesn't necessarily mean that we don't need any help either, just sayin'.

Fight 5 of the Warriors of Darkness? Good luck doing that alone without your adventurer friends you queue with for duties.

And yes, our character doesn't do much in cutscenes but I believe it's a simple solution. To how every individual player would want their character to react to things, they instead made the character not show much at all.
Giving the character choices how to react is another, but it'll be an illusion of choice anyway, done simply for "immersion".