There are incentives by near all states for constant overproduction. The remainder is shipped off as animal-food or gift to poor countries (basically produce bound charity). And that's just the farmers. The millers have vanished in Germany over the last 20 years until there where just a few left. Those few do stuff with the flour to get it up to decent "quality" >> https://de.wikipedia.org/wiki/Mehl#Zusatzstoffe_.28Mehlbehan...
Now its reached the baker, one of those jobs i did before i learned to code. Let me assure you, that the market will not cover you, if you are to exotic and small. We had one customer asking for gluten free bread- and my boss said no, cause it would have become ridiculous expensive and the customer was unwilling to pay more. By now super-markets have the stuff, but its produced by factory bakery's. Which are quite "something" if you listened in on the chat among those who learned baker there. Production has to roll no matter what. Mice squished dead in the bun machine? Kärcher to the rescue, steam and water - and go. Adding cheap substances, instead of expensive ones - surely the market would behave against that.
The invisible hand also doesn't regulate for invisible effects. Alot of shortsighted agents result in shortsighted behavior. My current boss, a really nice guy, has wrestled for years with chronic skin inflammation- and wonder of wonders, it vanishes if he did not buy factory products- try it- buy the raw ingredients and produce your own food.
So yeah, the health of the customer is a secondary concern, if the state is not watching - as in the US. Food Diseases taking out every 1000 Person- the invisible hand gives you the invisible thumbs up for that. https://wwwn.cdc.gov/foodborneoutbreaks/
Poor flour, with lots of ergot, that's okay as long as you dont get caught, if you dislike that - talk to the hand. You can market it as bio- and in that case your customers are lucky, if your field is next to a conventional farm, getting windswept by fungicides.
So, after carefully thinking- and comparing it with reality, this video must be a parody.