What Is The Topic Of Religion?
Seems a bit far fetched. Many meats are harmful to health as are fatty food etc but they are not haraam
Morality or Ethics is one domain of Tazkiya.
You’re focusing on the meat without focusing on the psychological impact it will have when you start eating beasts; there is always a psychological image of things you eat in your brain and it starts seeping deep with time and eventually there will be a sort of imbalance that will be created between a human’s physical animalistic being and human’s spiritual being. Islam’s Tazkiya deals in a domain where it can be ensured that animalistic being of humans has been kept in enough limits so that it doesn’t create imbalance with his spiritual being which is a metaphysical existence.