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.