Aside from some devout paleo people, I've never known a single omnivore who doesn't routinely have meatless meals, without even giving it much thought. Having meat with every dinner seems rather obsessive to me, or (in my biased view) reflective or someone who isn't very creative with their diet. There are so many awesome foods out there for which meat is a minor, optional detail. I suppose some people always find a way to insert some meat, even when it adds nothing to the meal as a whole.