Because you've been a victim of corporate anti-regulation propaganda.

The Kinder egg thing is because anything non-edible is banned from being mixed into foodstuffs as a general food quality measure. As in you can't add gravel or dirt or whatever. It was also supposed to ban sawdust but they realized they could just call it cellulose and say it's a fiber supplement.

This has the side effect of banning cheap plastic trash in your cheap chocolate that is a stupid product for morons (children).