If I give you a bunch of tasks to complete, and you manage to complete them all, does that signify you accomplished something?

It does not.

Some people have trouble distinguishing between "busy work" and "tasks that help the mission". If you can't tell the difference, chances are you're doing the former.

If I tell you to perform a task, and it's your top priority, why would you tell me you waited several hours to begin it?

If you have a spelling error at the top of your resume, what's the point?