Tony, meat eaters always say, don't eat meat where got strength? Rice eaters also always say, don't eat rice where got strength? Potato eaters also always say, don't eat potato where got strength? But I do think that there's logic to the argument that human beings are originally and naturally designed to be vegetarians, can survive and have strength, without eating meat. True carnivores can eat and chew and digest raw meat; human beings maximum with sashimi and rare steak only.
It's in the intestines. Meat eaters have shorter intestinal tracts, veg eaters longer. This is because veggies take longer to digest (due to the roughage and cellulose) and meat a shorter time.
Problem is, the human body has much longer intestines than most regular meat eaters, (check info online and you will know), so actually, we humans can't eat too much meat. It will rot in the stomach before it's fully passed out. And you know those people who don't eat enough veggies also poo much less. So it becomes a double whammy.
The triple whammy comes when you ingest half cooked meat which has more bacteria. Like rare steak etc.
So it is no wonder that humans get colectoral cancer etc. Just check online for intestinal length vs diet type. Basic science really. :p
Also it's in the teeth. Check out the basic human dentition and compare it with meat eaters and plant eaters in the animal kingdom. We only have two pairs of canines, not that suitable for tearing meat. We have so many molars, very suitable for grinding grains.
If only people stop to do some self examination of the human body, then what we are suited to eat becomes very clear.
Much of what people feel that they eat is partly psychological. The physical part is when potato eaters can deal with high GI of ingesting potatoes, while rice eaters require more fibre from their basic carb intake and not as high GI as from eating potatoes. It's habit, but we can change.
Hope you guys find the info useful.