Regarding Gameplay with 10 or More Players via Game Join

Today, a Japanese VTuber who appeared in my YouTube recommendations was playing a game with a party of more than 10 friends while chatting via voice chat.
But can this really be called a “fair game”?
On one side, there’s a group of more than 10 players who can communicate perfectly with each other, while on the other side, there’s a group that can’t communicate at all—this clearly lacks fairness.
In an environment like this, isn’t it only natural that there would be so many matches decided by a landslide, or matches where the outcome is determined immediately after the start when all bases are captured?
To improve user satisfaction, I believe this game join feature should be significantly restricted or completely eliminated.