An interesting article, Todd. But that would imply that newspaper, sports and even event photographers are, for the most part, not photographers.
I think a better distinction is snapshooter versus amateur versus professional photographer. But even as I try to distinguish the latter two there are examples that defy categorization.
A snapshooter is someone who does little more than look through the viewfinder and press the button. These people can sometimes produce wonderful photographs, but that outcome is coincidental.
An amateur photographer is someone who has some understanding of how to use and control his gear and the subject to produce a desired result. The result might not always be successful, but the amateur at least puts some thought into the capture. An amateur may occasionally get paid for his or her work, but does not rely on photography to generate any significant portion of his or her income.
A professional photographer is one who relies on their skills and experience in photography to produce work that earns them a significant portion of their income on a regular basis. You and I might not feel their work is of professional caliber, but if customers are willing to pay for their work on an ongoing basis, then for better or worse they are a professional photographer.