Star Wars universe does have lasers of all scales and power levels.
Yet literally no one uses them well on a personal scale.
The Jedi (and Sith for that matter) imbue it with a power of magical stone, and then…use it as a saber.
To balance this stupidity, stormtroopers, clones and droids all use slow, non-continuous energy blasters. With actual lasers, they could insta-kill any Jedi, but they cannot, because otherwise the movie wouldn’t exist.
Magic swords and magic powers are exactly what makes it fantasy. I cannot imagine a worse example to pick for your point.
Quote the script where magic is ever mentioned in the films. A light saber is a device with a button that Luke has the knowledge to repair.
Put it in your fantasy section if you want, I’m not even arguing it’s not fantasy, but it’s undeniably science fiction.
Quote the script where someone explains the science of how the Force works. A lightsaber is a special magic sword that can only be made by a space wizard using their magic on a special crystal. It’s magic with a futuristic flavor, that doesn’t make it science fiction.