@Thepennysjustdropped
I'm plant-based but I've had my parents and various friends tell me plant protein is inferior. I was thinking that most of the animals that people in the West eat are vegan - so, cows, sheep, deer, (pigs and chickens are omni). So they are mammals, like us, and they take boring old grass and build their healthy bodies with it. So yes, we can do that and cut out the middle animal!
Those animals are ruminants, as are many wild animals including giraffes and deer. They all have specialized digestive systems designed to digest grasses and high cellulose foods. They also have specialized microbiota that help in the process.
They all produce methane, not just famed animals. There are vast herds of ruminants in Africa and there are many in other places too.
Humans are not ruminants and cannot digest grasses the same way. To us it is fibre that passes through us. We cannot live on grass.
I am not saying this to be critical about vegan diets. I just think we have to be realistic about the impact overall. Even if we kill all the cows, goats, sheep etc., the Earth still supports a vast number of herding ruminants around the world.
And I have asked this before. If we all become vegan, what will happen to all the animals vegans seek to protect. I don't think too many people will keep cows and chickens as pets without using their milk and eggs.
Just a thought.