Sure, but that's not a counterexample. The point isn't that absolutely everything should be permitted, it's that restrictions should only be reactions to eviden

Sure, but that's not a counterexample. The point isn't that absolutely everything should be permitted, it's that restrictions should only be reactions to evidence of harm. Requiring advance permission for new packaging materials wouldn't have prevented the ocean microplastic disaster unless the permission system was so restrictive that we'd still be arguing about whether it should be legal to weave baskets to carry grain instead of having to try to carry the stuff in your bare hands. The right time to put restrictions on disposable plastic packaging is now that it's proven harmful.