So the theory is that Riflemen are ok in 1vs1 but total crap in 4vs4 so people have to resort to Pathfinders if they want to win correct?
If your "want to win" implies that its un-winnable otherwise, no. If your "want to win" means playing the game without shooting yourself in the knee, yes.
Yet Pathfinders commander seem to be far more popular in 1vs1 than in 3v3 and 4v4 and USF seem to have some of the best win rates in 3vs3.
You can litteraly find pro-player streaming those gamemodes to see how they they play USF. In 1v1 airborn is picked solely because it allows you to ignore USF tech and get AT gun+MG, no-one spams paths in 1v1 and no-one use airborn in 1v1 because of them.
Speaking off, it even if we forget about pathfinders and imagine that every one plays infantry company. Again it completely changes how rifles are played, because of the LMG. So even if Airborn wasn't even picked, people in teamgames are just avoiding stock rifles gameplay to begin with.
That does not seem to be inline with that theory...
I mean if you want to look at facts objectively and not just push your narrative for the sake on continuous argument, they are actually completely in line.
I've yet to see any attempt to prove why rifles arent sucking balls in teamgames, besides "well win rates", despite people giving clear explanation and reasoning why rifles design isn't working in teamgames.