Going gluten free is not really necessary in many peoples opinions , unless you are Intolerant or Celiac.
In fact, many of these foods are not at all healthier, and sometimes have more sugar and bad stuff. Its just eliminating wheat, nothing else.
But when people have relentless health issues and are trying to eliminate all potential causes, it never hurts to try cutting it out for a few weeks or so.It certainly can be life changing if there is an allergy.
This is just my opinion. I worked at a health food store as a natural product advisor for years. People get caught up in the hype and often times they don't have good reason to. Its misleading to think that GF means all around healthier.