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.
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.