Insect farming as future of protein nutrition: reality check
Currently, the problem lies in the genetic selection to make insects suitable for mass processing. 

Let's compare this to chicken farming


Human society already select chicken that will grow lots of meat for many years
There are machinery available to "process" the chicken
There are existing demands and supply chain.
Currently chicken is cheap


In industrial scale, it is all about ease of processing.  Currently, insects like crickets is not a good competing candidate. However, it is just a matter of time for the food scientist to discover a suitable insect.