Specifically for Apex Legends, random loot ticks can contain heirloom shards, the game's rarest resource. As a player, I'd want to share or immortalize the moment (if it ever comes) that I get random heirloom shards off a regular loot tick. Could also be useful for sharing moments when I get good items from a pack or open a pack I bought with very good items.
This can probably be applied to any game with random loot boxes.