But it's not a coincidence that Ben knows those people... Leia comes to him BECAUSE he knew all of those people. And Ben hangs around Luke BECAUSE he knew those people. There's a difference between corellation and coincidence.

I work for the same company as my wife's brother-in-law. I had this conversation about it with this guy from work, whom we'll just call 'guy'.:

GUY: How are you related to Eric again?
ME : Oh, he's sort of my brother-in-law. I mean, we're both inlaws. I guess I mean: the women we married are sisters.
GUY: Wow! Really? That's some kind of fantastic coincidence!
ME : ... I don't follow. What's a coincidence?
GUY: You both work for this same company, and you're brothers-in-law, and the women you married are also sisters! That's kind of neat!
ME : Not really, Brent. We're brothers-in-law because we married sisters.
GUY: Oh yeah... I thought you meant you were brothers-in-law before you got married.
ME : How would we be brothers-in-law before either of us were married?
GUY: ... Did you see the game last night?
ME : No.