it makes me think that you like shipped Luke and Leia in the first two or something

I did not. I can’t bring myself to give a damn about any Star Wars romance beside Ben and Rey.

It doesn’t go nowhere, it’s used by Vader to taunt Luke.

Woohoo, a five second throwaway line that could’ve been replaced with a dozen other things.

My objections to Leia being a Skywalker are as follows:

It comes out of nowhere
It goes nowhere
It feels contrived that the secret sibling is someone Luke already knows

Having Luke’s sister just so happen to be the only other woman he’s spent the three films with is contrived to the point of ruining my immersion. At that point I’m ready for Han to introduce himself as Uncle Skywalker. Say what you will about Rey being a Palpatine (I won’t pretend that isn’t stupid as well) but her grandparent only comes in at the end specifically looking for his granddaughter; he didn’t just bump into her at a bar.

I literally can’t think of any benefit to leaving this familial link in besides Ben having Vader’s bloodline, which is a sacrifice I’m willing to make. Doesn’t take blood to be a fanboy.