Well, yes, presentation of any form of information is effectively propaganda of one sort or another; in agreeing with your reply, I am issuing propaganda as to this particular point of view. The problem is that unless something is objectively demonstrable (which very little can be); everything is debatable and open to disagreement, and therefore you submit your ideas to the market of public opinion.
Why dislike someone simply because they're good at doing that? I usually respect skilled people.

I have to admit that I was somewhat miffed by Grims assertion that I lie to my clients. Why would I?