Because in Star Wars space battles are a visual metaphor for naval battles and ships sink
I love Star Wars and I love SWE but sometimes the answer to a thing can't be found in lore but rather in the visual language of film
This is also why all ships align themselves to the same plane in space even if they are above or below other ships
Star Wars Explained has also been doing a lot of stuff about various Visions, especially the first one and, like
We don't NEED to know how the bandit leader is or why the rōnin has a red lightsaber
All the answers we needed were given to us in the short
ESPECIALLY since Visions aren't canon, it extremely does not matter what happened before or after the 20 minutes we see
"Who is the rōnin?"
He's a stand-in for the basic trope of The Wanderer, a figure well-known in westerns and samurai cinema, both of which heavily influenced the early visual language of Star Wars and a natural choice for a Japanese studio to want to include in their take on a Star Wars story
