In fact, the comprehensibility of the entire ST rests on Leia being a Skywalker.
How so? Kylo doesn’t need to be a Skywalker to be a Vader fanboy, and he still comes from two important lineages, if you’re worried about it stealing from Rey Nobody.
So we’re just supposed to accept that he’s the son of Han and Leia and just so happens to be one of the strongest Force users in the galaxy?
I mean, the ST posits three massively important pieces of the plot all happening to land within a couple miles of each other on one planet in the galaxy, so I get that this shark is already well and truly jumped, but why add another coincidence to the pile?