Have you eaten lobsters? It's basically the same family. Wanted to post pictures of fried cockroaches here, but decided not to after wanting to throw up from googling the pics. Grasshoppers are good, though.
Are you evil reincarnated to even imagine milking a real life cockroach? Fiction has its limits, man. Stop. Get some pesticide, and help kill this vermin that plague mankind!
I mean I don't mind drinking it if I don't know where it came from. Like cmon people we are eating some disgusting things every day inour lives without knowing it besides lucky ones who know it.
I should tell you, cockroach milk actually exists, along with mouse milk, it is one of the most expensive drinks...
https://www.sciencealert.com/scientists-think-we-should-start-drinking-cockroach-milk-superfood Cockroach 'milk' = protein crystals (P.s.This is similar to how zombies have crystals in their brain. But, cockroaches have their 'milk' crystals in their guts.)