>>46720188Trainers take turns calling out commands, but the battles are still completely realtime according to literally all other Pokemon media that isn't the games. The literal taking of turns between Pokemon for the entire process is an abstraction.
Legends Arceus will show the closest GameFreak can get to how the rest of the franchise depicts battling, so they're at least trying to cull the abstraction issue knowing people's expectations for "realtime battles".