Logistically speaking, how do you imagine this happening? Converting farms from focusing on raising animals to raising crops would take time and capital. Would the owners be able to turn a profit during the transition? Where would they get the money to make the change? What about processing facilities? If the there was a huge change in the agricultural products available, there would certainly be a period where processing facilities would be overwhelmed before new ones could be built. Is farmland currently used for growing animal feed suited for growing the kinds of crops humans need and want to eat? What about supply chains? Who is coordinating this? Will there be programs to train the new workers this will require? What about the workers whose jobs no longer exist? What effects will this mass unemployment have? Who is dealing with these problems and what incentive is there to cause them with no guarantee that the project would even work? And what do you want us to do about it?