If you look at it from the viewpoint that all are deserving condemnation, and that God, in His mercy, chooses to save some (out of no obligation to do so), then I don't see where the robot analogy comes in to play. When God gives a person a new heart, ala Ezekiel 36, and causes them to be born again, they believe willingly, not as robots. That wouldn't be love on our part. But with a new heart, to do otherwise would just be insane. Yes, we would have a choice, but there would have to be some basis for that choice to leave, or not to believe.
John 6
66From that time many of his disciples went back, and walked no more with him.
67Then said Jesus unto the twelve, Will ye also go away?
68Then Simon Peter answered him, Lord, to whom shall we go? thou hast the words of eternal life.
69And we believe and are sure that thou art that Christ, the Son of the living God.
That is where we, as believers, are. Simon and the others stayed because they had no other place to go because they had been shown the truth. Nothing robotic about that.