It is also, like WH40k a universe where they already had their AI war, and banned them as a result.
So we have great machines, which are not computers, mentats doing the same task and role etc.
I think sidestepping the superAI we would expect in the future is a good idea for any future sci-fi setting, else the humans have no real point. (the Culture being an exception)
As an aside, the Brian Herbert Skynet minus-time travel crap does not exist to me. All the books outside the original 6 are fan-fic rubbish. Frank was clear in his writing that the Butlerian Jihad was about ending the human reliance and outsourcing of thinking to machines that led to the creation of a stagnant and apathetic society that was easily manipulated by those in control of said machines.
“Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.”
The way we’re doing already - happened much faster than Frank envisaged! Even the Lynch movie had a slightly dumbed down take on this in the extended intro which was cut from the theatrical version:
At no point was did we have any of that Omnius and Erasmus gonna exterminate mankind and were the real faces behind Daniel and Marty retcon junk. Frank was even going to write a prequel book before his demise
with the author of the Dune Encyclopedia about the Jihad which again reinforced that it was a conflict rooted in philosophy rather than a physical one against generic genocidal robots. The Dune Encyclopedia is amazing (as it’s written as a fallible in-universe document that openly misrepresents known history from the books and adds historical embellishments making it feel very in-universe) but Brian Herbert won’t let it be reprinted because the stuff in it is in conflict with his awful retconning of Dune history.
But yes the series is all about human variance and various untapped mental and physical potential we could have, which is also why there’s no intelligent aliens or even any traces of them (outside of the sandworms whom Leto II is certain were brought to Arrakis as a foreign species long before it was discovered by the empire).