A one sentence thesis is good communication. That’s the point of a thesis statement. It’s the core idea behind most writing education. If you don’t have a clear thesis up front, then people have to divine what you’re trying to convey themselves bottom up from the arguments on the screen.
“Luring the listener into compliance” is frankly the reader’s problem. PowerPoints are presentations, not debate stimulus. They are generally intended for one person to convey information, not foster a group discussion. It would be very bad to blame the concept of a blog if you’re drawn in by persuasive writing to a false idea.
PowerPoints are bad when someone is using it and you can’t tell what they’re trying to tell you. Especially with regard to whether it has the verbal explanation or not.
A primary social hierarchy (Scientology, a corporation, Mao-era China) might feel threatened by various secondary and informal hierarchies (people who practice "the tech" on their own and make changes, workers who have the knowledge of how to do the company's task in their heads but not written down, sysadmins who keep a file of anyone who could possibly help them solve problems in their organization or with their vendors, fox cults, ...)
An accusation that is frequently leveled at McKinsey is that management brings them on to "launder" things they want to do, what I can say is that your slide decks are not just seen by the systems thinkers who are running the show but they are also seen by the people that the people who are running the show want to persuade.
