Fair enough but you can't really express certainty on this point. It's very debatable and very speculative.
Once you walk into the realm of 'what nature intended' or start using terms like 'genetically designed', you're in a quagmire. And that is especially true when you are talking about homo sapiens sapiens. We're bipedal mammals with the highest brain size/body size ratio who use tools and have a highly sophisticated language.
We still have no idea how any of these things impacted each other, which of them came first, which were causes and which were effects.
Let's look at humans as they are now.
I think it would be great if humans ate meat on rare occasions, the way chimps eat monkeys (doesn't that seem like cannibalism? I know it isn't but it still creeps me out). But that isn't how we do it. Not even close. Don't you agree at least that that is a problem?