Why? Because people do patrols and bounties and while there at it they stop and take 2 seconds to pick up materials?!? Now let's spin it using your logic: people who play crucible have no lives because they spend 15 mins running around a small area trying to shoot someone. Just to finish the match and be rewarded with 3 crucible marks, a little reputation, and MAYBE some type of equipment!! Yup makes sense....