I believe you. It does come across as a bit much when the few references we have for the whole thing include "Man may not be replaced." and " Thou shalt not make a machine in the likeness of a human mind ". At least as far as the Herbert books go. I'm under the impression the....other....books had a different take on the matter(and is apparently one of the reasons they can be ignored).
Which implies either people went to extremes after the Jihad, their concept of "Thinking Machines" is different when what we would consider them or both.
Well, that's because Frank Herbert was arguably a philosopher first and a science fiction writer second. His works tended to be based around his beliefs and ideas on religion, society, politics, human nature and so on. For example, he saw technology as as much a curse as a boon, since he believed its predictability imposes severe limitations on people's ability to deal with the unexpected. This is why in his Dune universe the Butlerian Jihad was a reaction against humanity having become stagnant and complacent in both a cultural and evolutionary sense due to an overreliance on AI, computers and other advanced technology. And why afterwards they became replaced by mentats, guild navigators, bene gesserit and bene tleilax, which are all groups that are all about pushing human physiological and mental capability to their limits. Tho this is not actually explained in the books themselves, but in his notes, essays and lectures.
Kevin J Anderson and Brian Herbert are nowhere near as philosophical in their writing. To put it bluntly, they write sci-fi pulp. Nothing inherently wrong with that, but it does mean Frank Herbert's more complex ideas get simplified into something more easily digestible. This is why in their version of the Dune universe the Butlerian Jihad wasn't a reaction against overdependence on technology, but against a literal robot uprising led by genocidal AI.
And the Kwisatz Haderach, then Leto Atreides II's Golden Path, then the Scattering not painful but necessary steps to jumpstart human evolution through adversity in order to prevent extinction through stagnation, but preparation for the return of those machines.