Here's my question: how did Luke end up stuck slogging in the desert with his grouchy uncle while his twin sister got to grow up a princess on a beautiful world?
Obviously, Obi-wan went easier on the boy.
If Luke had taken on the place of Bail Organa's kid, the rebellion would have been found out very, very fast. I'm sure Bail Organa ran into Vader many times while he was under Empire suspicion, however I believe it's very had to explain if Vader walks into your house and says "What the hell, that's my fucking son! Why do you have my child?!"
Apparently fathers have no connection whatsoever to their daughters. They've got to strangle their son multiple times before they notice they even have a daughter . . . sounds like an episode of the Simpsons.
http://blog.traysoft.com/2009/12/nobody-told-me-its-impossib...