True, but some (such as myself) only advocate portions of the concept. I think there are aspects of life both helped and hindered by advancement. I guess this makes me a diet-primitivist / pseudo-primitivist / weak-primitivist.
I do embrace the advances in thought (yes, I do realize that most are a result of technology), medicine (ditto), and communication/art (not as much, but still).
I do not embrace the basic lifestyle, consumerism, and the types of stress that modern life entails.
For me, it is far more nuanced than "technology bad, eat dead carcass good".