Perhaps one day humans will outperform machines in comparable tasks, such as in Dune, where - due to discovery and proper application of a substance known as "spice", ever since to drive the economy as well - layers of abilities have been unfolded in man, allowing to entirely discard "thinking" machines given similar direction. Likewise to what has been said in The Matrix, the machines could be excellent at what they are designed to do, but they will hardly ever become unpredictably better or transcend their defined boundaries, which the humanity has proven to be capable of achieving and more so - by some bizarre rule of chaos - which is even expected to eventually happen, if the humanity only survives. "Thou shalt not make a machine onto the likeness of man", one of the pieces of wisdom in Dune says. Why is that? I think, to save oneself the pity.
EDIT:
There were also other reasons why "thinking" machines were discarded in the universe of Dune.
EDIT:
There were also other reasons why "thinking" machines were discarded in the universe of Dune.