Networking is a form of communication. If they're not good at this form, what others are they bad at? Code monkeys are cheap and plentiful, people who can communicate their designs, collaborate with others, and work on a team where everyone benefits from the specialist expertise that each individual has are rare. The latter are the ones worth hiring.
Bull. I find networking hard and tasking, but am also one of the best communicators on any team I'm in. They're two different skills - creating new bonds and performing within new ones.