Not a bad idea actually. If some people can die of sesame seeds, the rest of us can manage without, sprinkle the seeds on our bread at home or bake our own bread if we can't live without sesame seeds.
If you're going to do that, then you need to ban all prepared foods from having any kind of allergen, because someone might die of it.
That means bread made with wheat is now illegal, because some people are highly allergic to gluten. If you don't want gluten-free bread, you'll have to make it yourself.
Also, you can't have any food with shrimp or shellfish. Peanut butter is now illegal (but you can make it yourself). Pistachio ice cream is illegal.
Not only is wheat bread illegal, but any baked good can't be made with milk either, since some young children are allergic. And you can't substitute soy milk either, since some babies are allergic to that too. Baked goods in your proposed future sound really awful, quite frankly.
Gluten-free baked goods made with potato flour are illegal too, since some people are allergic to potatoes. So french fries are also illegal.
Some other things you won't be able to have either in a pre-made food, or at a restaurant:
- celery
- carrots
- pumpkin
- mushroom
- onion
- garlic
- bell pepper
- fish (so apparently you want to ban sushi restaurants too)
So I'm curious, in your vision of the future, what exactly do people eat? Beef and lettuce for every meal?
Nice collection of straw-men, but elsewhere in discussion it has been made clear how the situation with sesame in bread is not comparable to your cases.
If A can die from sesame seeds and B can't and the A-to-B ratio is something like 1:1e+6, doesn't it make more sense for A to bake their own bread instead?
I don't think they're that different. The muffin I had for breakfast contained wheat, milk, egg, and sesame oil. Salicylate intolerance is at least as common as sesame allergy, so let's toss in the blueberries, too.