Crops can blight, animals can get diseases. I don't know much about hydroponics but I know that bacteria are a concern. What food source is the most reliable, the least likely to produce less food than expected?
Worms are less of an efficient food source than, for example, beans. The sci-fi trope of eating insects is silly. Deus Ex had it right - soy food is the future. (And the present!)
Depends on what you have on hand. Many insects have an almost 90% conversion rate of food to insect biomass and if you have a lot of plant matter or other biological material available that humans can’t consume they are great.
Farming soy beans also produces waste and stuff still spoils. Turning that into consumable biomass efficiently via insects or other crustaceans is still a viable option. Especially since their droppings make great fertiliser. Including that in a food production cycle is not the worst idea.