I realise now one improvement or change I could have made to my thesis.
It isn’t actually important that the player character can’t speak, so much as it is important that the tragic hero doesn’t listen. That is hubris- pride that they know what is right, that they will ignore any warning that anyone will give them. They believe they are above fate (or karma, or whatever law of balance etc you want to think about).
Whoops, I could have ended up with a Creative Component I actually thought was any good, and recieved better marks overall 😉