Ooo, burn!! 🔥 🤣 She's on the rampage!

It all about da money, in it! No money to be made in developing those sorts of crops, until there's no food left due to crop failure. Or maybe they've already developed them, but they're not going to waste them on cannon fodder. Wait until they've eliminated the riff raff first. Oops, sorry, I'm going conspiracy theorist now...