In addition, the Iraqi forces are getting priceless experience in fighting this war. They are out there under the tutilage of US forces, so they are learning how to do it right. When we leave, the Iraqi forces will be the most well trained, able Arab forces in the world.
Yes, we're teaching them the "Western way of war." In the long run, that may come back to haunt us. However, in the short run I see no alternative.