In addition to using death to add depth to fiction, there's the use of death to add depth to characters. Star Trek has been using dead family members for character growth almost since the beginning. Kirk lost his brother early on, and on TNG, pretty much everyone had at least one dead family member. Picard loses his brother and nephew; Riker's mother died when he was young; Worf's parents died when he was young; Data's creator dies; Beverly Crusher's parents died when she was young, and her husband died; Geordi LaForge's mother is missing in action; Deanna Troi's father died when she was young....
Hmm. Did they, though? Add depth to the characters, I mean. It worked for Worf, although that was as much enabling plot as character. Jack Crusher's death has always influenced the characterization of his wife and son, so that's a good one. And Riker's mother enabled the tension between him and his father, although that was really a one-off affair and could have been accomplished in many other ways. Apart from that, though, I don't think these deaths ever contributed that much to the characters. Picard grieves for the loss of his family in
Generations, but it wasn't until the novels got the ball from the films that it had any impact. Dr. Soong, Troi's father, Crusher's parents, La Forge's mother going MIA, and Riker's mother outside of
Icarus Factor never really had much impact either. A failing, perhaps, of the series, but then again it's not as if the characters ought to be wracked by constant grief. Death happens, as some people here are fond of saying, and most of the time it won't be a life-changing experience for those connected to the deceased.
(Come to think of it, I don't recall how Crusher's parents died. Has it ever been said, onscreen or otherwise?)
Fictitiously yours, Trent Roman