My friend Jake works on regional jet engines up in Tacoma. He once found a missed torque check on a fuel line coupling that was two threads from failing. That kind of stuff really shows the weight of the job compared to cars.
Honestly, how many car repairs have a full paper trail that follows every single part for decades? A plane's logbook is like its life story, and a missed signature can ground the whole thing. I heard about a mechanic catching a crack because he was checking for a repair done fifteen years prior. That's not just fixing a part, it's being responsible for every hand that touched it before you.