The logical flaw is that you assume that all studies are worthy of consideration, and the hidden inference that equal weight should be given to a study regardle

The logical flaw is that you assume that all studies are worthy of consideration, and the hidden inference that equal weight should be given to a study regardless of its methodology or rigor. Good information generally cancels out bad information. I have no particular opinion about the veracity of any MSG claim, but there have been so many bad dietary studies published. I would urge a skeptical default position on any result, and only moderate skepticism based on evidence of sample size, methodology and rigor.