I did notice a ton of "special" illnesses in the Borg. To some extent I think it's just people looking for any way to stand out as different.
With that said, I found out after leaving the cult that I have issues with lactose and yes, it's very real. It makes sense that some percentage of JWs have issues and the rest are just batshit crazy.
By the way, although I know it's a hardship having to bring food to something with everyone's particular issues, it's not exactly fun being the person with the issues. Lactose is in so much. We went to the big Harvest Homecoming Festival here on Friday with all of the great festival foods and I couldn't have 99% of it. It is a bummer. I went to a party Friday night with cake and cookies and buffalo chicken dip and queso and little hot dogs in crescent rolls and flavored chips and I couldn't have any of it.