Yes but those were robot citizens not robot bounty hunters. Different purpose, different programming. They are not literal killing machines, and the emotions they have do allow them to know suffering; so jack helps them live peaceful happy lives, cause why not.

On the issue of the sentient robots, while they may have personalities they likely still have hard programing; They were programed to be killers. Personality or not, they are litterally soulless killing machines and there is no changing them.The rare exception to this would be the scant few like X-9 who was programed…