Because I'm not talking about shadow maps. Your obviously out of date on what modern desktop GPU's can do.
Same for lighting. Gpu's can already do realtime double bounce lighting effects without faking.
The thing holding them back though is the api. so hopefully will see better lighting effects come out with dx12.
considering that ashes has point lights on every particle effect. and most dx11 games only have up to 10 real lights in a scene.