That was an option on console for most of the generation so far: Performance Mode vs. Quality Mode. But that’s mostly because nearly every game released so far has been a hastily ported last-gen title. It feels like this gen has really just barely started.
Single-player console games being 30fps is not new by any stretch. That’s basically what consoles do. And they’ve managed pretty well with it so far. If you want to spend 2-3x more on a beefy PC, you can get all the frames you want. More power to you.
20 years ago… Skyrim, Fallout, The Last of Us 1, GTA4-5 on PS3/360 gen. 30fps.
10 years ago… God of War, Gears of War single-player, Fallout 4, The Last of Us 2 on PS4/XBoxOne gen. Also 30fps.