In Revenge of the Sith we see Luke delivered into the caring hands of Owen and Beru, who agree to raise Luke as their own in the harsh environs of Tatooine.
We see Leia taken by Bail Organa, where she is to be raised as a Princess on the lavish world of Alderaan.
Leia becomes a member of the Imperial Senate, following, unknowingly, in the footsteps of her mother by becoming an important political figure at a tender age and fighting for the rights and beliefs of her homeworld in an effort to restore the Republic.
Like Anakin, Luke leads a simple, hard life, wishing for adventure but not knowing how to achieve it. Unlike his secret sister, he feels his life has taken a detour into a cul-de-sac.
Until the chance to leave Tatooine arises in the form of Ben Kenobi, who tells Luke of his heritage (albeit "from a certain point of view") and gives young Luke the chance to see those distant stars for himself and journey with him to Alderaan.
But Luke declines.
The disappointment and surprise is evident by Bens almost petulant reaction. He knows that, in order to restore balance to not only the Force but to the galaxy, that he needs the son of Anakin Skywalker by his side. But Luke's not paying ball. Suddenly he shrinks back, worries about Owen and Beru and merely offers to take Ben "as far as Anchorhead."
So, is it unreasonable to think that when the Empire attack the Homestead, killing Beru and Owen in the process, that Ben would have forseen this?
That their death, as abhorent a thought it may be, was a means to an end - to ignite Luke's lust for adventure and, dare I say it, revenge?
Luke put two and two together and realised the danger Owen and Beru were in, and raced to the Homestead at full burn. But there was no reason for him to see their charred bodies
Was there?
Wasn't that the moment, right where we'd watched him stare at Tatoo 1 and 2 wishing for a life away from Tatooine, when he saw there was nothing left for him there? With his aunt and uncle, at least he had some kind of purpose, a safety net to fall back on. With them gone, Tatooine held nothing for him.
Don't you think Ben knew that too?
So, in a manner of speaking, you could say that Ben sacrificed Owen and Beru to bring the son of the Chosen One into play.
"From a certain point of view."