If PVP matchmaking is RNG, why are premade Parties still allowed in Fronlines?

[RNGSatan]

If you think 4 people out of 24 are too much of a factor to swing games (16.6% of your team), what do you think would happen in Crystalline Conflict if you have 2+ people playing together (40%+ of your team) ?

What about people who do callouts in Frontlines ? It seems to me like the team that has people giving instructions has an advantage. Maybe we should get rid of chat too.

you give to much credit to 95% of playerbase who come to play FL just from duty roulette. those 4 with voice comms doing PVP daily and planned combos easily wrecks non PVP players who just do FL for EXP.