True there are lots of alternatives. But very few you could farm in a back garden on so little space and with such little resources. Much of the world’s population look to the insect world for their food. It is also a high probability that your children and your children’s children may have to move towards eating insects because of population increase and poor space management of the world.
Another fact for you all.
If we all switched from cows to kangaroos for meat we could cut global green house emissions by a considerable amount (Kangaroos rarely fart unlike cows). Doubt you could milk a kangaroo though