He has to "waffle vaguely" about grand ideas when addressing the whole nation because going into details would alienate most of his audience. This doesn't mean

He has to "waffle vaguely" about grand ideas when addressing the whole nation because going into details would alienate most of his audience. This doesn't mean he doesn't know what he is talking about, as you seem to be implying (I don't want to read too much into your comment).