I thought the same but have a few issues with what this would mean.
First that guardian article I posted explains how vegan farms actually destroy vital parts of the ecosystem and inhibit life from taking place via fungus, small critters, bugs, birds etc. I never considered the effect of mass use of pesticides and herbicides.
Second is more an issue with the world system of capitalism and anthropocentricism, my fear is that once animals become useless to us we will stop considering them necessary when push comes to shove.