Sounds like a nightmare of an achievement, about as much RnG as a cursebreaker or rivensbane title in matchmaking. People exclude themselves, Bungie saves them time from awful and wasted time by not adding matchmaking into heroic. You act like the five successful MM runs are worth the millions of failed runs that will give them more backlash and hate than just not having MM. If it requires any coordination and teamwork matchmaking just is a nightmare to deal with them.