Earlier quoted context omitted.
The fact remains that somebody can explain Perelman's proof of the Poincare Conjecture to Paul McCartney, if McCartney was so interested. Whereas you aren't likely to find people who're able to so explain deconstruction of something or the like in a manner that's clean and simple and easy to understand. This either suggest that a) the person doesn't understand it, fully, himself; or b) deconstruction/humanities is so…
I could explain deconstruction to an interested party, and I imagine I could do so in slightly less time than it would take to explain Perelman's proof of the Poincare Conjecture to McCartney. If the interested party is already well read in the philosophical works of Husserl, Heidegger, Hegel, Nietzsche, Freud and Levinas, I could probably do it in a weekend.
(Or as Chomsky argues - why is deconstruction necessary when the conclusions it reaches can be simply divined by ordinary laypersons, without all the verbosity and the pretentiousness of language?)