I didn't know this of course until I started mining message boards for the upcoming Star Wars movie. But it makes sense to me that this is a thing: that Poe is connected to Luke thru his mother, who went adventuring with Luke to find a tree. So yeah, Poe Dameron's mom knows Luke Skywalker and spent considerable time around him.
So I guess I'm here to say that people who bitch about Star Wars being too much about the Skywalkers are whining in the same way as someone saying, "Why are all these Avenger movies only about the Avengers?" I haven't seen the upcoming film yet (of course) but I can make some guesses:
1) Rey's heritage will somehow intertwine with the Skywalkers.
2) Snoke will somehow be tied into the Skywalkers in some weird way.
Repeat after me: Out of all these worlds and all these billions of people, the only people who actually matter (and who actually create major change) come from the Skywalker family for whatever reason. If this upsets you, then may I suggest the Orville? It has nothing to do with the Skywalker family and takes place in space.
This public service message has been brought to you by the Force, which (I hope) is with you...always.