It's the center of the Skywalker universe*. Last time I checked Luke was from the family Skywalker and he is in the new film.
Padme and Co just happening to land on Tatooine in the PT is universe shrinkage... Luke returning to Tatooine in the ST is just continuing the story.
(*and the center of Han's universe too. So it's 200% the center of Leia's universe LOL)
Now, if a totally unrelated set of new characters in the ST also happen to be from Tatooine, then you've got a point.