What an immature response. You're the one acting like a twelve year-old here. Unless you've read a good portion of his writings on language and cognition published through the last half century, you might not want to dismiss his life's work based on an off-the-cuff response to a random email prodding him for sound bites.
There are solid reasons to believe that purely empiricist approaches to learning have fundamental limitations that seem incompatible with what we know about human cognition. Those reasons (e.g. the poverty of the stimulus argument) may be less convincing now than they were in the 60s but they are still not easily dismissable. Keep in mind that Chomsky's goal is not to build useful software but to uncover the roots and mechanisms of human language and cognition.