The guns in Star Wars don't shoot lasers they shoot blaster bolts. The only lasers we really see in the Star Wars movies are the Death Star's main gun and some of the weapons in the Clone Wars like the slow walking laser tanks that bring down one of the Separatist globe thingies as it's trying to take off from Geonosis, and the front cannons on the Republic gun ships. Notice when they fire, you see one continuous beam that connects from the source to the target, which is sustained until the laser is turned off. With the blasters, you see a streak of energy going across the screen. It leaves the source and then impacts the target once it reaches it moments later. The reason they don't use laser guns is because weapon grade lasers take a much larger power supply than can be easily carried around, and the blaster bolt technology is cheaper and the ammo is much more compact. They make up for the lack of accuracy with volume. Also Han is a pretty lucky shot a lot of the time. Chewie has a bow caster which has those magnets on either side of the end of the barrel to help make its shots as accurate as possible, but even then it's not all that precise.
And don't tell me about enjoying the story, I enjoy it just fine thank you very much.