Aren't you anti-Korby people forgetting about Data? What makes you think Korby isn't like Data?
Some will argue Data makes any sort of difference--as if Data was (somehow) a life form, but it cannot be denied that this perception probably stems from Data being a popular main character from TNG, more than anything else. At the end of it all, he--like Korby--is not a living being, and not part of some other guy's utterly inapplicable race fantasy.
Further, answers to the topic--
Why did Dr. Korby commit suicide?--settles the matter, because the subject--Korby--reached the only logical answer to the question of his identity (he was not
real, born human with a soul), thus the mechanical copy ended the deception used against all he encountered.