It would seem that the difference of opinion here originates in the definition of further. Someone who knows nothing is further (in the information-theoretic sense) from the truth than someone who believes a falsehood, assuming that the falsehood has at least some basis in reality (even if only an accidental relation), because they must flip more bits of their belief (or lack thereof) to arrive at something resembling truth. On the other hand, in the limited, human, psychological sense, they are closer, because they have no attachments to relinquish, and they will not object to having their state of ignorance lifted from them, as one who believes in falsehoods might object to having their state of delusion destroyed.