I’m going to get killed for that one, aren’t I? But see, here’s my logic. Space is monstrous! Huge! The logic that we could ever actually travel through the whole thing is ridiculous and insane.
Let me illistrate.
Here is a picture of how far away the moon and Earth are to each other. That’s far away, when you think that is Earth in the picture.
Then, here is another illustration of how small our Sun, and yes, I mean our SUN, is compared to many other things in the galaxy. I’m assuming it’s accurate. It seems fair.
And through all that, we writers actually pretend to say that people can travel across this space.
But then again, as writers, we are allowed a few liberties and one of those is the idea of warp/jump/faster-than-light engines. But I still say that I write probably more science fantasy than science fiction.