> It's generally difficult to open products without damaging the packaging.

You're right, but the damage is not squarely due to customer or the packaging design. Some of the boxes arrive at my doorstep (from Amazon or what else) has clear shipping wear on it. It has banged around in the box, thrown around in an envelope, etc.

The box is worn, but the product is not damaged. Even I return the box unopened, the seller can't ship it back out. It needs to be renewed again.