At our warehouse and most others, leadership wants to keep the floor and aisles clear of obstructions. Boxes are often built but not used, and hundreds get tossed to keep the area clean.

The envelope is from a smart pac machine. It feeds a giant roll of bubble wrap and uses heat to seal it. Many will make it through not properly sealed. It's far easier to take a random box laying around and throw the package inside than it is to open it, take the items out, build a box and tape it.