I come from New Zealand and my parents always fed our cats raw blade steak. Some dried biscuits too. Their cats, mostly Siamese, all lived long and healthy lives.
I too fed my cats raw meat, often sheeps heart, when I left home, and my cats all thrived.
Now I live in Canada and found that my Siamese here would not eat raw meat when I started feeding them "adult" food. I decided it was because of the hot temperatures and perhaps the meat went "off" quickly, as cats will only eat fresh food..........unlike dogs.
Anyway, now I feed them canned and dried food and they are happy campers. Though they get raw meat by catching their own prey from time to time - meat, feathers, the lot is consumed.