Umm, there's way more than that going on inside 2D. If you're not familiar with the subject maybe you should not make baseless affirmations such as this one.
I'm not sure what you're objecting to in my statement. It is a simple matter of fact that Direct2D calls the Direct3D APIs to trap to the dxapi.sys - Direct2D calls Direct3D to do it's rendering. That's how DirectX (and for that matter GDI) works.