I find that the most -- the only, really -- convincing argument for siding with the goblins is that it is very soon clear to you that the Absolute have everything to do with your condition and the goblins ought to be the quickest way to find out more about her and the tadpoles and possibly do something about them, whether you want to get rid of them or indulge in them.
But this viewpoint doesn't have any expression at all in-game, as far as I noticed when I played a goblin-side character.
