[javindo]

As with any automated transport discussion, there's the question of liability. If a pilot is at fault, there's an obvious liability on them. People have an intrinsic trust of a human pilot to sort out an issue if it arises, versus relying on a computer which is a complete black box to the passengers. If a pilot is at fault, it's a forgivable thing - in the worst cases the families have some closure, some level of "the pilot messed up, such is life". If a machine or system is at fault, who's to blame? The engineer? The programmer? The maintenance worker? The airline for procuring a cheap contract?