The classification of the camera is not really about how capable or good enough the camera is. It is more about the Nikon intends to market the camera. Most of today’s low end DSLR’s produce better image quality then many older pro bodies.
Judging by the price point and the controls on this body Nikon is primarily targeting the enthusiast consumer with this body. Of course some pro’s and semi-pros will use the D7000 for their work even though Nikon has chosen to place at the enthusiast level in the overall lineup.
In actual use the designation of pro, semi-pro, or consumer is irrelevant. What is important is how the camera fits your needs and your shooting style.