Here's the deal my friend. I agree with you completely and have been asking for this many times over the last year. Unfortunately it won't happen. Bungie has made this clear in an official statement. They say that finding your own fireteam outside the game is part of the games "challenge". This is clearly a bullshit response that really means to say, "we know if we provided easy access to endgame material via in game matchmaking, everybody would complete everything in our game too quickly and be bored and not play... So we will make it a hassle for you to actually find a team so you will stick around longer in hopes to eventually play for the best stuff." This is their cop out way to make the game more difficult. Sadly, Matchmaking for endgame rewards won't ever happen.