A very logical conclusion.
“Kirk: Evaluation of M-5 performance, it’ll be necessary for the log.
Spock: The ship reacted more rapidly than human control could have maneuvered her. Tactics, deployment of weapons, all indicate an immense sophistication in computer control.
Kirk: Machine over man, Spock? It was impressive. It might even be practical.
Spock: Practical, Captain? Perhaps. But not desirable. Computers make excellent and efficient servants, but I have no wish to serve under them.”