Okay, I explain it more deeply for you: The advantage of static meshes in Torque Constructor, WED, Lawmaker or in the Irrlicht editor is: You can compile static shadow maps on top of the geometry. Every static mesh can cast and receive shadows (at least it should work like that, if the shadow compiler works properly and it does in all of the mentioned tools except of WED).
Just out of curiosity, what are you always talking about that WED can not work properly with shadow maps? I am working with WED since 3 years and A7 WED since 1 year and it casts and receives shadows on top of geometry fine so far, and obviously for other people also, so what problem have you specific?