Because people who seek truth about politics, finance etc... also seek truth about other topics, such as health, and the truth is that poor nutrition is a root cause of many western health illnesses. Not to suggest that all GM foods are unsafe, but GM foods aren't foods that our ancestors ate and that our genetics evolved to be able to process. As such, discretion suggests that GM foods should be viewed with some skepticism.
There is growing evidence that even "quickly" genetically engineered foods, such as modern wheat, may be unhealthy foods.
Never trouble trouble til trouble troubles you. Fortune Cookie