People look at your desk and see chaos. You see a filing system.
The contract is in the third layer of the left pile, slightly to the right. The sticky note with the phone number is under the coffee mug. The USB drive is between the self-help books you bought but will never read. You could find any of them in seconds.
Take the time to organize it all into a labeled filing cabinet and then try to find it? Not a chance.
Your memory system isn't alphabetical or categorical. It's spatial-contextual. You remember where things are by where you saw them last, encoded with spatial coordinates and visual context.
A pile is a spatial system. Each item's position relative to other items creates a unique address. It looks like chaos but it's a functioning index, one that works with how your brain actually encodes location.
A filing cabinet is an abstract system. It requires remembering a category, then a label, then a location within the label. Three layers of abstraction with no spatial cues.
Your piles are a spatial database that matches your encoding architecture. The people who love you have probably figured this out already. They look at the piles, look at you, and wisely close the door.
Don't apologize for your piles.