Ground loot disappears

Please explain with all the genius your dev team has, in the simplest terms; Why tf does ground loot disappear after a death in the instance? How is this good for the player? How does this better the experience ? How does this improve gameplay? What’s the logic behind this? How did you people convince yourselves “yes this is the right move”

This has to be one of the most brain dead decisions I’ve seen in a game.