I'm not sure if I agree with the simplicity of this, but it does highlight a common misconception about CMS systems. The CMS manages the content of course, but these days it often needs to provide much more 'out of the box'. At Elcom, where I work for example, we are positioning our CMS product as the platform that you build your line of business (LOB) applications on. It needs to provide a solid, scalable, highly performant, extensible foundation that can be easily integrated with your other business processes.