For most people the further they sit away from a screen the less they are going to notice it. And console gamers play on a tv from the couch. Of course if you show them a 60fps version after they played in 30fps they will notice but most people don’t understand why that is and thus not care. Like how many people watch movies with motion smoothing on since they don’t see that it looks smoother than the movies in the cinema.

Rockstar can get away with this since the vast majority of GTA player will be mainstream casual gamers that only have fifa/madden and CoD in their gaming collection.