The only thing that would be sure is that no one born in this timeline after he was killed in the altered timeline would exist.

We stick with it at this point because it’s not worth the hassle of changing it, and while points related to our axial tilt or the eccentricity of our orbit are less arbitrary it ultimately doesn’t matter. It is about the time that has passed and one point in the orbit is as good as another.

They want money and losing half their audience would cost them money.

https://youtu.be/xq0XNILIYTw?si=q7ptO3AWuEjAtaWh

Is this what the ring wraiths would look like if Galadriel took the ring?