Earlier quoted context omitted.
Hm, I do like products with nutritional data. But isn't the non-regulatory solution here to just not buy products without nutritional data if so? I mean, I'd certainly contact my favorite brands and request that. If they won't hear me, then maybe there's a local alternative that could?
Did you check out the "lemon market" theory? https://en.wikipedia.org/wiki/The_Market_for_Lemons
My argument was that the non-regulatory/voluntary solution would be for customers to demand from manufacturers/sellers to provide nutritional data, else they'd contact/buy from another manufacturer/seller.