Jake Sisko was the the very worst character in the Star Trek universe, in just about every episode that he appears in he's either on the verge of crying or plain out crying. He lives on a space station in space with all the dangers that entails and he never toughens up. ok he losses his mother in season one at an early age, but that should have help him to grow up quicker and become a man, but he never does. If we are to believe in this character his father would have sent him to live with his grandfather on earth. His father would have seen that his son couldnt make it living on a DS9 with all the dangers that surround them on the station, he's consistently a nervous wreck. He should have been a girl at least that would have been believable.