Xur also makes it better for some of the players that are not as fortunate as you with your drops. For example, I have been playing since release and have been level 28 for several weeks. I always max out of vanguard marks, complete the daily, weekly, and nightfall and still have yet to get an exotic weapon in a drop. I have only gotten 2 exotic bounties and both were for guns that no one wants. The only reason I have been able to get anything is because of Xur. I can understand your point of view but, don't take your luck for granted and assume everyone else gets the same. In my entire time playing destiny I have only received about 15 purple engrams period and most get me shards or coins. Some are just more fortunate than others when grinding for the same amount.