You are underestimating how seriously difficult some bugs can be to diagnose. I've seen super difficult bugs in large complex systems take over a month of dedic

You are underestimating how seriously difficult some bugs can be to diagnose. I've seen super difficult bugs in large complex systems take over a month of dedicated effort to solve, despite the eventual fix being only a few lines long. That's the kind of bug where you take dozens of pages of notes as you puzzle through figuring it out. And this is at Google, with smart engineers. As the old saying goes, it's knowing where the problem is that's hard.