Here are the stories as "we" tell them (I am aiming at the text, not Covès).
Let him come to me, in a system without any pesticides, never treated, relatively in "equilibrium", full of refuge areas
When will the babacools think about two fundamental things: a) a vegetable garden is never a natural system in equilibrium - it is an anthropized space; b) a natural equilibrium is always a system "oscillating around balances", with for each population, ups and downs ... And will want to take into account the fact that on seedlings or young plants, a slug can clean 1 m in a row in one night ...? Or a small patch of plants?
After, yes. You've seen the tunnel greenhouse: I'm currently harvesting salads, and almost every salad has one or two or three slugs. Without any apparent damage. Threatened by drought (it does not rain in a greenhouse!), They remain hidden under their feet. Or they eat what they prefer: diseased leaves, starting to rot. What I eat is intact. We share" ! There it works.
And the rest is literature from smoky people. Who write on an I-Mac in the 16th and buy their food at BioCoop!
I come out of a great tension with the slugs, with damage. And that, it is observable - elsewhere than on the screens of Smartphone.