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.
Suspension of disbelief, or belief in suspension tech?
Start with land speeders… what holds them up? If you’re in a universe where it’s simple to make anti-gravity devices, why not use them to “fly” your big space ships too?
A long time ago, in a galaxy far far away, they knew things we still do not, and apparently they did not know many things that we do.