Although I don't disagree that utterances express desires and try to make complexities precise, I actually don't think at all that any of our efforts to speak and mean things are ultimately why we speak.
Paul FryI make a distinction between theory and methodology, the latter being the practical deployment of a premise. Theory on the contrary may well be applied, hence becomes methodology without a hitch, but isn't necessarily practical at all.
Paul FrySatire about any and all professionals with a special vocabulary has been a staple of fiction and popular ridicule since the 18th century.
Paul FryI do identify the escape hatch through which Foucault eludes the charge that he himself is an author/authority, hence a tyrant. He establishes the category of "founder of discursivity" for the authors he likes. Slippery, perhaps, but you can see what he means.
Paul Fry