It isn't just him (and arguably it isn't him at all: its people he has working under him); I got a chance to meet some of the people on the panel when they were at the hearings in LA, and they actually seemed quite "with it" (although certainly not "technology expert", but that's asking a lot).
Yes, there is no way he is making the decision himself, or even capable of doing so. That's exactly my point. Yet somehow he's in charge of the whole show? In any case, TFA does give him sole credit for the edict.
More to the point, why exactly does the Librarian of Congress' staff have authority over cell phones? Oh, because it involves the DMCA. Supposedly, the DMCA was made for copyright, like books and music recordings. Books and music fall under the interests of the library. So do cell phones? That's just too much of a stretch. Either the law is being applied far too broadly, or the DMCA is really outside of the purview of the Library of Congress.