For big teams it does, for small ones sometimes it gets even worse since the good/lucky empires ending in the same team has no solution when teams can't change.
You and me already discussed this and we agree to disagree.
Another falacy. Some could be wiped out sooner than others. Do not put on the same shelf playing with a whole empire 'til the end and lingering in a corner with a scout while your team mates control tens of colonies and ships.
The point here is not trying to convince others to always play with fixed teams, it's about allowing you to play more than just fixed teams, because that will indeed mean you'll have to wait months without playing. Because we are gonna play without fixed teams at least half of the games. You know that, right?