https://screenrant.com/dune-movie-futur ... ai-reason/
I think ultimately you are right - he was just riffing around on "cool lavender" with an edgelord ending and folks read way too much into it.In Herbert’s original Dune timeline, he briefly describes how artificial intelligence and all other thinking machines were wiped out in a series of devastating wars called the Butlerian Jihad. The original Dune novels explain that the fighting started because of an ideological schism between two factions of humanity – one that had come to rely on the thinking machines for most aspects of life, and one that believed doing so was inherently harmful to the human race. The latter group ultimately won, leading to the destruction of all thinking machines and a renewed focus on uniquely human intelligence, manifested in orders like the Mentats and the Bene Gesserits.