It’s funny that you find that deceptive. I much prefer the serving-size nutrition table once you know how to read it. When I’m in Europe, I have no idea how to figure out how many calories I am actually eating without a scale (which I have never used) or without eating the whole bag. In the US, all you usually need is a measuring cup in cases where serving size isn’t specified as “pieces” or whatever. I always thought the European model was designed for compliance while being maximum deceptive.
I can see how the 100g thing gives you a nutrient density by weight relative comparison. But in absolute terms I find it useless. 