Why? Why so many people want to use baked lighting? It's a lot of work to build and support, it's hard to work with, has lots of limitations, requires rebaking on every change in the level. And all that for pale, washy, inexpressive and absolutely static result.
While with deferred lighting you can have flickering and blinker lights, moving lights, put a point-light on every projectile, weapon flash, hit effect, you can make every light on the level breakable, you can have enemies with flashlights looking for the player in the dark.