So those corporations that I listed - you think that meat and dairy are the main ingredients in the products they sell? I would be very surprised if that were true. Corn - in many forms - is in almost all processed foods, as are seed oils (from plants) and as well as wheat and soy.
And there are patented, genetically modified dairy cows as well as patented, genetically modified soy beans and corn. I don't think that's as common in fruits and vegetables.
For my family, I love knowing the source of my food, which is far easier for us with meat than grains and beans. I know the environmental impact - positive when animals are raised well - and I know the families who raise them.
But all best to you! I hope your food is keeping you healthy and happy :)