Well, that’s ridiculous. A kitchen is chock-a-block filled with sharp things that will cut you. The metal strip on boxes of foil is considered dangerous? I think it’s just cheaper.
Or more recyclable maybe? To recycle the cardboard box would mean tearing off the metal strip. This is all just guessing.
We spent 2 weeks in France this summer in a rented house, and the kitchen had 2 boxes on the wall with metal serrated edges for one to put their rolls of foil and cling film into so France maybe have similar issues with no cutting edge on their boxes?