The anti GMO arguments include many that are agnostic to the details. That's not a flaw per-se. There are considerations beyond health and nutrition. For examp

The anti GMO arguments include many that are agnostic to the details. That's not a flaw per-se. There are considerations beyond health and nutrition. For example, some may not want to financially support the patenting of nature, full stop. Again, a well-operating market would let such informed decisions be made. Again, the science angle is sort of irrelevant. The people who oppose labeling do so out of their financial interests, not the love of or respect for the idea of science.