Some people still don't know how to trigger heroic public events or passing an orb to another player in the corrupted strike giving more damage. I see people yelling at their TV's because a rando is just killing adds and not doing the mechanic. If you wipe heroic menagerie, you get sent back to orbit and will have to matchmake again with a new group of randos if matchmaking was a thing. Think about the time you waste explaining everything to a new group if that happened. I say Yes to no matchmaking for these reasons.