...just ignorant.
I have a life-threatening nanny state allergy (other's lives-not mine).
What is that?
A friend of mine's child's "peanut" allergy was cured by letting the child crawl around the house and yard, then "reintroducing" her to peanuts at a very early age.
We don't even know how many acute or long-term illnesses may be caused by over-protective parents, antibacterial this and that, "organic" foods, an enforced low-fat or vegetarian lifestyle, or even what used to be common exposure to second-hand tobacco smoke.