Meat comes from plant food (digestion), and plants come from Sunlight. So meat is just another form of the Sun.
But most important... there are only two elements that exist in all creation... Metal and Crystal which can be animated through complex processes;Life.
I bet there will never be an answer to the veggy-meat eater debate... maybe its like telling a gay/lesbian its all in their head... how does anyone know except them?
Maybe when tshtf there won't be any food for anybody and we'll all have to become Suneaters!