Yes, I would agree links help as well, greatly. But link building is roughly 25-30% of the total SEO pie. My argument is about on page content, and utilizing a keyword density tool to communicate to Google how relevant the on page content is. The higher the density, but not so high to warrant a black hat technique, the more opportunity to rank on a certain keyword. If you cannot agree to this statement, I'm sure you're just focused on gathering MOZ points.
Nothing is an exact science in the SEO world. And if it is, you apparently work for Google...or Google works for you.