So why can't I say the same about Ben Kenobi in A New Hope? Why the same planet that Luke just so happens to be on. Why so close to him that he actually knows by reputation, and where he lives?
We don't need the other films to explain that. Ben states that Luke is Anakin's son. It's not the slightest bit surprising he'd want to keep an eye on Luke in the hope he might become a Jedi, especially if Ben is the last remaining Jedi. Hell, even if Ben flat out knew Luke wouldn't be a Jedi, it wouldn't be surprising that he decided on a hiding place that allowed him to keep an eye on his friend's son.
The wild coincidence here is that the Obi-Wan Kenobi that served Leia's father during the Clone Wars is actually the same person as the Ben Kenobi that was a Jedi with Luke's father.
Regardless, we're getting bogged down in minutiae here (the death of internet conversations everywhere).
My point being:
1) We have been explicitly told that there are two sides to the Force: good and evil, the dark side and the light.
a) These two sides work at cross-purposes
b) Neither side is infallible (Anakin falling from light to dark, Darth Vader's redemption, Luke's brush with the dark side in his fight with Vader, Kylo Ren's entire existence)
2) That the Force has consistently through every Star Wars movie influenced intuition and decision making for a number of characters in varied and diverse situations.
a) Intuition isn't always followed
3) The title of Episode VII being "The Force Awakens"
a) This strongly implies that the Force (or it's light/dark components) are actors, not merely tools. See 1b) for why this isn't "Force as a God" territory.
Leading to the hypothesis: The Force's component parts actively work to influence what would normally be seen as coincidence. Fortunately, this is a falsifiable hypothesis! We'll be able to conclusively rule in one direction or the other as we see the trilogy unfold.