And what I mean by thematically, is that Owen is the rock, the unchanging man, the one afraid to go out and explore. Owen is everything that Luke (and Anakin) are not. He's afraid, he's not inquisitive, he doesn't rock the boat, etc. This is why I don't agree with ideas taht Owen would've/might have been a soldier or even a failed Jedi. These characters are archetypes. Owen does nothing. He stays home, he does what is required of him, he's frightened of the world outside of his limited sphere.
So, IMHO, Owen, along with his family before him, lived on Tatooine, he did what his father did before him, and his father before him, etc., much like my own family. I'm one of the few to break out and NOT become a farmer (which is why it was so easy for me to identify with Luke). In that case, Owen was doing what he has always done, and he believes that is what Anakin should be doing, and believes that Luke should be doing what he does. It's all about diametrics and archetypes, and in Owen's case, having Anakin going out, becoming a Jedi, attempting to achieve his dreams---and then become something twisted and corrupt only verifies and validates Owen's stance. You go out, bad things happen to you.
This is why Luke mustn't dream, mustn't aspire. He must be kept down---for his own good.
So, that is why I think Owen MUST remain on Tatooine (and Anakin originated)---originally and conceptually---not just from what he says, but also in regards to who he is as a character. Placing him and Anakin on Alderaan (or anywhere else) originally is not only a contradiction to dialogue from ANH, but also a contradiction to archetype.
Just my two-cents.
