In other threads, there are people who say the more we are exposed to dirt and germs, the more robust our immune systems become. Maybe feeding our chickens worms fed on sewage would be a good thing! (Don't shoot me.)
I'm not going to shoot you, lol.
But I am going to ask (rhetorically), are you going to purposefully undercook chicken to strengthen your immune system?
Your common sense won't let you, and there's a good reason why.
There are many pathogens the body struggles to build immunity to. Like Salmonella. Even if you've gotten sick with it before, one bite of undercooked chicken could send you to the toilet for days.
Immunology is a complex science I won't pretend to know enough about. But I do know that foregoing sanitation is not a viable option.
And we are already exposed to more than we know. I read a study during covid with scientists trying to track the spread from aerosolized spray on the beaches (with sewage piped to the ocean, and the force of the waves bringing it back towards land and blasting infectious particles into the air).
The larger issue with sewage is the sheer unpredictability of it.
We're not just talking about Ecoli from poo.
It's everything that person was exposed to.
From pathogens and parasites, to medications and drugs. To the toilet bowl cleaner and whatever else they flushed.
It's what your mechanic washes off his hands after working on cars, and what some industrial manufacturers are allowed to discharge into municipal wastewater.
In wastewater treatment, it's considered "clean" when it falls within a certain tolerance limit. The same way a bag of rice is only allowed to contain up to x amount of insect parts.
Long, long ago, maybe the middle ages? People realized that growing food in their own waste was a bad idea.
Other creatures waste is not such an issue. Like livestock manure on the garden. But same-species waste increases the chance of cyclical transmission.
Oh, and someone in this thread commented on the chance of parasites surviving the bug drying process. Well, parasites are designed to survive a whole lot. Some stages of their lifecycle have hardy coverings as defenses that prevent moisture loss and chemical penetration.