I agree with you. I also think that we should start using the metric system and change American measurements over. However,this would be quite costly to the American government to change over to the metric system, just as it would be financially "unwise" for American food companies to go about changing all their food labels.
From a strict, mental health POV, though, it's brilliant. While we're at it, why not change all the serving sizes to be equally the same (like using a standard 100g for all labels) so than when comparing labels, you can figure out the nutritional density of everything fairly. That'd be helpful, too!