Are they? Im sure they must be on an industrial scale. But if you are feeding them kitchen scraps…youve got to have a giant tank, it sounds like some sort of mill to grind them up? That means youll need to dry them out, which is either trying time and space consuming or it means more equipment. Is there some sort of sterilizing involved so you catch some sort of weird cricket fungus or something?

Meanwhile, if you get the right breeds, chickens will mostly manage themselves and can at least partly make up for a less efficient metabolism by foraging independently. Also your house doesnt end up infested with crickets and you dont have to change any recipes.