Relying solely on larva, crickets and spiders, is like feeding yourself with aperitif/tapas, like lump eggs, fried small fishes, and small crabs It kind of does the job, but that's still aperitif not a real meal, except if you eat those in large quantities... And that's still not a meal, it's a megaperitif All insect based food/meals are rooted in famines, that's when people started to default on bugs, for lack of better option. Just like frogs and snails consumption, same deal, it's famines/necessity which literally brought them on the table.