Not exactly the same thing, but a few years ago the law changed to require a sesame-allergen notice on foods that had sesame. Some manufacturers starting adding sesame to foods that didn't need it, because they concluded that including the notice was easier than guaranteeing that their product was sesame-free. The intent of the law was to protect people with sesame allergies, but the result was fewer choices for them.

Sometimes laws have unintended consequences.

https://apnews.com/article/sesame-allergies-label-b28f8eb3dc...

If a manufacturer is unwilling to guarantee/monitor the lack of sesame in their food, and you having a presumably severe sesame allergy… isn’t it correct not to be eating that food?

Like previously you trusted their lack of sesame based on vibes, which you probably shouldn’t have been doing, and now they’re explicitly telling you not to trust them on this; this seems to me strictly better. You’ve lost a choice that never really existed in the first place

An actually unintended consequence would be if they introduced sesame because they were going to have to put the label on it anyways