I am not arguing that lying by omission cannot be bad. Neither am I arguing for a specific policy toward lies of omission. I am arguing that folk ethics sees them as consistently less bad than lies of commission with the same consequences, and that a general discussion of the ethics of honesty ought to reflect this either by including reasons to do the same or by accounting for non-ethical reasons for the folk distinction. Otherwise you've got a theory that doesn't match the empirical data.