>Why would you sell candy without telling people whats inside them? Most people don't like all fillings.
Why don't all countries use metric? Not everything in this universe needs to follow a perfectly logical explanation.
As for the pictures, I can say the most famous brand people are most familiar with where I'm from is sees candy chocolate boxes. I've never seen Kraft candy, that company is mostly known for cheese. If sees candy did label their candies I've never seen it and therefore it must not have been very evident.
Regardless what you think, the quote exists because most people usually don't know what they're eating when they put these candies in their mouths. See here for the quote: https://youtu.be/egkrxkiUnoo?t=43
If you squint you'll see that's a Sees candy box.