Perhaps you're right, but I very much doubt that this is the case :)
My professional background is in math, CS, history and psychology (my career has been quite varied, and included research in neural networks, although that was over 15 years ago, as well as field work with criminals).

My main motivation wasn't to challenge your beliefs in the capabilities of an artificial intelligence. I fully realize it is possible that it will take the form of an all-knowing god, but to challenge your beliefs in our ability to predict technological advances and threats to humanity (of which I doubt you have any promising models, because there aren't any), as well as to provoke thought about how power flows in society, where a single charismatic Hitler was far more dangerous than 100 Einsteins, and whose charisma swayed people regardless of their level of intelligence (in fact, people with humanities background like writers, were, on average, far less likely to be swayed than people with science background). I think that an intelligent 100x that of humans (whatever that means) is still likely to be swayed by a charismatic person. I am not suggesting that AIs would thus be subjugated to people or integrated to our society, necessarily, but that they, too, might feel their own social forces, and there are some interesting dangers lurking there. For example, consider this: what happens not if someone invents an AI, but if 50 labs invent 50 AIs at the same time (which, frankly, is far more likely). How would those AIs interact with one another? How would their goals evolve as a result of that interaction?

Most discussions of AI concentrates on intelligence and goals/motivations -- which is understandable given the psychology of the people participating on the discussion -- and not enough on the AI's psychology and social psychology (even amongst other AIs). I probably know the answer you have to my question of "why do you think it is intelligence that is so dangerous", but that is not the right answer, or, at least, not the interesting one (even if you define intelligence as a general problem-solving skill, and higher intelligence = more problems of any kind solved faster -- though there are very good reasons not to define intelligence in this way) :)

My problem with the singularitarians' "threat model" is not that it is not plausible, but that they have not given serious consideration to other kinds of threats, even those including AIs. They tend to fall into the trap many people who are only science-educated do, and fall in love with their one pet-theory rather than truly try to challenge it. Yudkowsky's discussions of potential challenges to his "AI threat" are rather laughable, not because of how he counters them but by how narrow his thinking is (which is a result of his obsession with what he calls rationality).

I'm sure Yudkowsky would find my discussion of his followers' psychology ad hominem and extremely irrational, but that is not the case if you're trying to evaluate not a particular threat model, but to construct a meta-model of threat models and how you weigh one against another. If you construct a Bayesian analysis of threats given that meta-model, you'll see that psychology plays a big role.

Another thing I find curious about his thinking (which very much affects how he weighs threats) is the assignment of negative infinity to the event "destruction of the human race". I think that if you consider the following -- your own death, the destruction of your life's work, your own physical suffering, the death of your entire family, physical suffering of your entire family, destruction of your country (this may not seem relevant to some, but I have a good reason to include it), destruction of your culture, destruction of human civilization, destruction of the human race, and destruction of the planet -- you'll either find that people assign negative infinity much sooner than "destruction of the human race", assign that to events other than that one and not to that one, or to none of them, and in the latter case, the jumps in values would be rather surprising (or not, depending how you look at things). For example, I would give the destruction of civilization and destruction of the human race the same value (not negative infinity, though), and the destruction of the planet a much, much lower (more negative) one. For instance, I find a nuclear holocaust a much worse result than an AI destroying all humans but keeping all animals alive, even if some humans survive the first event (but not civilization) and none survive the second. I would also assign a lower value to all humans becoming fascists than to an AI destroying all humans.

But I'm sure there are others who are more thought-provoking than him who discuss this topic.