How much does the 18-55mm f/3.5-5.6 suck?
I have done maybe ~50% of my commercial work with the Nikon 18-55 (usually add a flash, though) and probably 95% of the creative stuff I post with it. It's all about how you use it, and to a certain extent how you edit the pictures.
Not to bad if you are in daylight, but inside, and bad lighting it is a nightmare.
If you put a decent speedlight on top of the set-up it becomes very viable inside, even in very dark settings. But ya, good luck trying to use it w/out anything besides ambient light in indoor/dark settings.