Why should meat not be eaten?

‘There is no turpitude in drinking wine, eating meat, committing adultery, etc., for that is the natural way of created beings, but abstinence brings great reward.’- Manu

We do not live for eating rather we eat to live. Accordingly, we should eat only those things, which give power to our body. Egg and meat are counted in non-eatables for human beings.  By eating eggs and meat, instead of increasing our power, we do a lot of harm to our body. It is a hard fact that without giving pain to other beings we cannot get its flesh / meat. The sin of this violence is shared by meat-producer (killer of the being), meat-seller, meat-purchaser, meat-cooker & meat-eater.