Yeah, but that's still progress in a way, progress away from the false goal of unconditional realism. Cartoons are generally cheaper, which means we can have more things, and also has more useful design space. Something like TF2-style "all characters must have distinctive silhouettes" is much harder if you're also trying to do total realism, because you end up so much more constrained with where the distinctiveness can be. (Color? No, nobody's running around on the battlefield in bright red. Nobody's wearing crazy hats or has two-foot-tall bouncing hair. A lot of guns look a lot like other guns. etc.)