Cogent or Fallacious #4 - Eat What You Want (If you're active)

Looking for something a little less serious for the final assignment, on NPR I found this light hearted article about a Texas duo who ate whatever they wanted as they cycled across Texas.  They stated with the best intentions on eating healthy and balanced meals for their trek but quickly just started eating whatever they wanted due to lack of options and necessity of energy as they were burning over 4,000 calories a day.  I looked at his reasoning and found it to be cogent.  It's realistic for most people to be able to eat "poorly" as long as they are active.  While this article is extreme, it's premise that for active reasonably healthy people, calorie counting is less important as their bodies burn the fuel that is needed.  In my own life I regularly see skinny as a rail people getting giant 64oz Cokes from the convenience store but from their dress and/or vehicles it's obvious that they have active jobs were they for sure work hard physically.  Whereas I choose diet drinks because I choose not to go to the gym and have a sedentary job in an office