Comment by indymike

There's a lot that I think you missed in your reading:

If you read the preambles to each chapter and the glossary in the back of Dune, you'll find that the Butlerian Jihad was a violent war that lasted 100 years.

If you read the preambles to the chapters in Dune, you'll find the Butlerian Jihad's problems were explained rather succinctly: people turned over their thinking to machines and were ruled by the master of the machines, and thinking machines created poverty for workers.

The entire society, the great houses, the spacing guild, the Orange Catholics, Bene Geserit, and Mentats, all who emerged to replace functions of thinking machine and all three organizations had very real motivations to ensure that thinking machines would never rose to prominence again (and the Bene Geserit were quite surgically violet when needed) and it was clear that doing for an individual was a capital crime, and for a ruling house, would invite at the least the Spacing Guild cutting your world off, and transporting armies to destroy you at a deep, deep discount. The entirety of society was aligned against thinking machines, and this is what made Dune so different, and for me, fascinating as I grew up.