I follow the code line by line, checking every box like I'm supposed to. But I'm just matching rules to a checklist without really knowing why they're there, so I miss things that a real understanding would have caught. When someone asks me the reason behind a requirement, I go quiet and hope they move on.
More people experience this than they realize.
You follow the rules without understanding why they exist, so things slip past you.
If this sounds familiar, the Library can help you find the bigger picture.