So you're basically saying a game can't have filler?
I said that whether itq was a criticism or not, his characterisation of. 'anything that doesn't advance th plot is filler' was incorrect. Games are to give you things to play, not just plot lines. In films, the action serves the plot. In games the plot serves the action.
For me, at first blush, filler is something that doesnt give you a new gameplay experience or mechanic, doesn't enrich the world and then doesn't advance the plot.