man I never really got that complaint
like yeah, I guess I get it on a fundamental level
but I never see it as "oh, yeah, out of the entire universe THESE families are tied to this thing, always"
I always saw it as the other way around and the bloodlines causing it, if anything
Star Wars was always about family so as improbable as it is I was always into the idea of the films following generations and always ultimately being about the Skywalkers
I get how improbable it is and all but what isnt in this sort of film series
I dig the weight of the characters being related and the weird tragic drama that comes from those realizations or disappointment in your own offspring or whatever. It's at the core of the series so it makes sense they follow it up. Otherwise it's just "adventures in space".
I'd be fine with Rey either way, I guess, but there's no chance she doesnt have represed memories and some kind of hidden training, be it as luke as a father or just mentor