Did you regularly supply veggie/vegan only lunches though?
Those of us with complex dietary restrictions (that aren’t anaphylactic allergies) are pretty used to picking around what we can & can’t eat and just taking the bits we think won’t make us ill.
I used to be vegan, loved the vegan diet, but I’ve developed bowel disease and can’t eat dairy, nuts, seeds, soy, onions, tomatoes, lentils, beans or any type of legume, dried fruits, soft fruits, grapes, root vegetables, brassicas, beetroot or any of the squash family. Also can’t eat beef or pork. None of them will kill me but I will be in bed I’ll for a week after.
I’m Left with chicken, fish, limited wheat, apples, raspberries, carrots, peas, peppers potatoes and rice and not much else. Usually with a meat buffet there’s something I can eat, but veggie/vegan tends to be heavily legume based. One of the conditions I suffer from is incredibly common. Look up the fodmap diet.
I’d much prefer a vegan diet tbh, but I’d have no protein source. I’ve never requested a meat only meal mind - no one would even want that!