If you offer the public FDA-inspected cinnamon for a 20% premium over not-inspected-and-may-contain-dangerous-levels-of-lead cinnamon, a lot of people will pay the premium. But a large percentage of people will opt for the cheaper cinnamon.
If you let it be known that the FDA inspection amounts to a high school dropout trying to read a manifest on a shipping container full of imported cinnamon, a lot more people will opt for the cheaper cinnamon. But a significant percentage will still pay the premium.
There is very little about that inspection that protects people, and just because something is not inspected doesn't mean it has lead in it. If you really want to be safe, you should run your cinnamon through your own detection lab.
What we need is an iPhone app that can detect guns, explosives, anthrax, covid, Canadians, and any other airplane hazard. Then let people carry that personal TSA sniffer onto the plane. They can feel safe and secure and the rest of us can save a fortune in taxes.