Earlier quoted context omitted.
That's why I said in my original post as long as the bread is made in a sanitary fashion. You can have health codes and food safety without requiring years of school. And your final point of flour exploding, that's a issue for flour mills not little bakeries. Most of the world does not require such extensive training to become a baker as Germany and the rest of the world is doing just fine.
The example page I picked is the workplace safety page of the union responsible food processing, bakeries among other things. And it explicitly list flour explosions as the largest danger in bakeries: “In Bäckereien und Mühlen sind Mehlstauexplosionen die größten Gefahren.“ (translated: “In bakeries and mills, flour explosions are the biggest dangers.”). A flour explosion in a bakery is something every local fire dep…
As best as I can tell, we haven't had a fatality from a bakery explosion in the US in the last 70 years, despite a much lower level of regulation. There's been a couple of large factory explosions and a few grain elevators/mills that have killed people, but ordinary bakeries seem not to have managed to do so.
There's also health risks from flour dust, but there's ample workplace safety regulations that help mitigate these.