Originally posted by Zack Fair
I like to think Kenobi chose to sacrifice himself in order to fuel Luke's resolve to battle the empire. Luke was stuck in neverland during the Death Star adventure. Sure he made up his mind when his uncle and aunt were killed, but until then he was angry at a "faceless" behemoth. Kenobi's sacrifice hit Luke harder than the death of his foster parents IMO; and it helped focus Luke on what Obi & Yoda wanted Luke to do. Call it the force, call it whatever ye want but Kenobi had a much greater impact in Luke's life than poor Uncle Ben.Besides the whole "create destraction for Luke and co. to escape."
The best explanation is...Ben was just a plot device biscuits
OB1's death was more impactful on Luke than his foster parents...?
Unlikely. He was with OB1 for...how long exactly? I'm gonna say a week...MAXIMUM. Probably less than that, but I'll give him a week for grace, for I am kind. He remembered nothing of his parents (obviously). Whether they were his foster parents or not, he was raised by these people. They did not have to take him in, they chose to 20-some-odd years before. They may not have been his birth parents, but they were certainly his real parents. They were Luke's parents and family. And in one day, they were taken from him by the Empire.
Luke spent a week with OB1 and learned a few tricks, Luke respected him because Luke knew that OB1 fought with his father and said his father was a great man, so Luke knew that OB1 wasn't just some old cook. He lived and fought during the Clone Wars. He respected him, sure, but his death certainly did not mean more to him than his parents, whom taught Luke everything he knew.