I don't think that it's safe to assume that intolerance or sensitivity to MSG is non-existent....among SOME folks!
Gosh, there's allergy, intolerance and sensitivity to a myriad of foods and various ingredients.
But, I think that the demonizing of some foods and ingredients the way some folk do is wrong.
I've got a friend who's sensitive to coconut...he thinks it's the work of the devil....LOL....especially since it and it's fat, etc. have become so popular in recent years.