And that's the reason it's annoying. Their used to be ranked and unranked modes. If you feel like playing a sweaty e-sport mode than you play ranked but cod isn't causal anymore which it always has been for like 15 plus cod games.
A game that funnels to one algorithm of matchmaking cuts down on costs and doesn't splinter the fan based into different lobbies.
I can understand a low budget game with a small online community needing to group together to keep everyone together, but when you got 20 million COD gamers, there's enough people to fill all modes, ranked and unranked.
Another reason why one mode like SBMM is used is to entice people to buy microtrans in hopes spending $5 here and there on gear or perks in videogames makes them boost better so they can rise above.
But even if that works temporarily, it 'll just sunk them into a higher tier and then rinse and repeat.
No wonder microtrans and EA Sports ultimate packs sell so well. Everyone feels in parity position so you spend to get an edge, but eventually just get placed in another parity position.