These animals die for no reason other than cultural norms.
What do you mean with centralized system? Isn't this what we have now, i.e. factory farms? Are you suggesting to go even more concentrated? In what way will this be better for animals - if animals (just like us) don't want to be killed?
Also, do you have any sources that explains that we evolved to eat meat and that we have to continue to eat meat. Do you mean we can't survive or be healthy without eating meat?
And yes, animal products have essential vitamins that are difficult to get from plant based diets.
It sounds like you're suggesting to have even bigger concentration farms. Please watch the Earthlings documentary that I posted above - it highlights the realities of factory farms. Interested to get your thoughts on that.
Also, you talked about ethics, just repeating a question I had above - when it's not about survival - how do you kill a sentient being that doesn't want to be killed?
> And yes, animal products have essential vitamins that are difficult to get from plant based diets.
Do you have any sources for this? As jamesgagan posted here - the Academy of Nutrition and Dietetics says a plant based diet is healthy and there are other organisations saying the same.
In addition to that, the UN urges to move to a plant-based diet, because feeding the planet on a meat based diet is not sustainable [0]
Having all this evidence, don't you think that weening off the world of a meat-based diet is the smart thing to do?
[0] https://www.theguardian.com/environment/2010/jun/02/un-repor...
edit: formatting