And on what basis could you possibly reject it upon?
I have input. I have mountains of input. I populate the mind of the protagonist. All ambiguity is resolved by me.
If BioWare wants something to happen, it happens.
But if they do that without my input, I won't play the game (which is why I stopped playing ME games after ME2). Whenever what you describe actually occurs, I take my ball and go home.
If they want a character to think or feel a certain way, that character will do so.
They can't possibly do that. The thoughts and feelings are not directly visible, and if they were I could simply declare them abstractions.
It's all about one's standard of evidence. Yours seems restrictive. If that makes the games fun for you, that's fine, but why assume that everyone else must use yours as well?
This includes the supposed player controlled protagonist.
That's the first part you got right. All control is merely supposed. Both mine and BioWare's. If you don't want that control to exist, don't suppose it.
Do note that this includes expressed thoughts and feelings that can't possibly be explained by some sort of hidden 'head-canonned' agenda.
All possible expression can be so explained. This could only be prevented by offering a proof that there could be some expression which necessarily couldn't be explained, and that, I posit, would be beyond the ability even of Earth's greatest philosophers.
And how is moral realism an extraordinary step?
It's always an extraordinary step. I can't even imagine how conclusive evidence of that would look.
What do you think a karma meter is?
A gauge. Why are you so confident that you know what it's measuring?
And not all games have one, so I'm not sure why you mentioned it.
When the 'narrator' explicitly says an action is good...
And we're assuming the narrator to be reliable, are we?
...that makes it as real as anything else in the story.
And there you have it. "As real as anything else in the story." How real is that?