What is difference between a professional and a blogger ?

One of my fellow blogger taunted me stating that a professional can better review a product or service or even post blogs.  Bloggers may not have perfected the fine art of editing, verifying, substantiating, or referring because he or she undertakes to pen his thoughts or impressions based on his actual user experience or known circle reference. The intention or motive of a blogger is to be candid and truthful as far as possible without getting into the realm of doctoring or defamation.  Blogger is basically unpaid servant and a professional is a paid employee.  I am sure you all might disagree with my take ?

Blogger is one who candidly expresses his opinion, shares experience cadidly without fear of being punished, tormented, defamed in words, pictures and videos.  A professional can better a blogger because he is paid for with caveats.