Is it that surprising? Your average person doesn't know diddly about economics, could care less about what goes on in foreign countries (or hell, their neighbors homes if it doesn't affect them), and few people even understand why many of the liberty's being eroded are important anyway. But eating? We all do it, and you can bet everyone has ideas and opinions on how they prefer to go about it.
Besides, diet basically lies at the heart of problems like growing obesity, diabetes, heart disease, etc. and all of the medical problems which that brings and our present health care systems are entirely unprepared for. So it actually is kind of important.
You'd be surprised.