Why?

In this view, there is no need for BSP Blocks with static lights either,
since this is the same concept:
Create a static lighning, that is rendered once, and needs not
renderingtime ingame (it just needs to be displayed).

Not every game needs dynamic shadows. If the gamelight / dayligt does not change,
and the lights dont move, there is no need to make the lighning dynamic.
The only problem that will persits, is that the shadows of units and Models will
look different than the shadows by blocks...