In college, I lived with a girl who had a very serious allergy to nuts and eggs. We talking trace amounts could kill her. All the other housemates were really careful. She was the only housemate to get her own kitchen press rather than sharing between two so that she could know exactly what was placed in there at all times. There was an exclusion zone around her food in the fridge, she had her own kitchen cloths and she brought a few pieces of cookware that only she would use. We took it very seriously.
I’m not sure children could be trusted to do the same. I think some children might even try to trigger the allergy if they got wind of it, not knowing the gravity of the situation. I guess the child could keep quiet about it and do their part to stay away from the foods of other children. But when the child is very young, could they be careless about this?
I’m actually on the fence here. It seems like something could be put in place to protect the child without having to go full ban. But, on the other hand, nuts are something other children can eat at home. It’s as serious as life or swift death for some people with allergies.
A ban on nuts isn’t something I’d get worked up about, to be honest. It’s a small thing.