Guys did u know that even in books Vader was almost killed by smugglers couple of times? By traps, spaceships fights, powerful blasters etc. Non-force users are rly viable to kill force users, even powerful ones cus good equipment traps ships etc. There are many artifacts, materials etc that give lightsaber or/and force immunity. Also dont forget that our main character smuggler can power just dont use and dont train that, he can have only good developed instinct.

:V Smugglers can easy kill Force Users with ships, traps, powerful blasters. Even Vader was nearly killed by smuggler 2 times, remember that smugglers or troopers etc can also be strong in force but just not trained. Troopers and Smugglers can easily kill less powerful jedi/sith, they have bigger problem vs "force monsters". In legends sometimes Smugglers work as bounty hunters (just in their own way). Han Solo nearly killed Vader with Falcon, also in cutscenes and movies and books jedi/sith doesnt have chance vs good armored ship.