It's a well known phenomenon I've observed from JWN, my own COs. A new CO we had once who was fresh from being a normal elder and after a couple of visits he said, "Well I've finally become a true CO...I now have food intolerances."
I mean, only once did my husband and I ever have a CO around for dinner and they couldn't eat this, he couldn't eat that, she couldn't eat this...it was so hard to cook something with none of the zillions of things they were 'allergic' to.
And then after all that the wife couldn't come anyway because she had a naturopath appointment or something.
Why do all CO's seem to have weird dietary problems?