I would argue that Individual MMR doesn't have a place in a game where an individual's performance can not guarantee victory, but that is a different topic.
Low MMR players are not all bad, but most of them don't communicate, and may even have turned microphone audio off. The cases where I encounter a low MMR crew (one that gets set as Underdog when I move to spectate, or looses underdog when I move from spectate to their ship) that is actively communicating are extremely rare compared to the many mute/no text chat ships that meet the same criteria for low MMR. Trying to teach the mute crews feels as futile as speaking to a wall. In these cases I would rather let them make their mistakes and loose so that when I rejoin the solo Matchmaking Queue with a lower MMR.
My goal is to get on a fun ship with good people. Increasing my MMR by winning difficult games does not bring me closer to this goal. Instead I may not always bring my A game to an uncommunicative novice ship that in my estimation stand no chance of winning. It is my Meta Game of dealing with the Match Maker, sometimes it does not help to play the best I can. I see this as a failing of the over all design of the game.