As a software developer, that’s not how testing works. QA is always trying to come up with weird edge cases to test, but once it’s out in the wild with thousands (or more) of real-world users, there’s always going to be something nobody ever tried to test.
For example, there was a crash where an unmarked truck with exactly the same color as the sky was 90° sideways on the highway. This is just something you wouldn’t think of in lab conditions.