Conversely the use of animals is seen by many in the medical field as necessary. While it is not ideal to cause harm to animals it is a safer way to test new products compared to testing them on humans. Typical research and development will begin trials on rats. If those tests prove successful then another set of tests are conducted on monkeys. Once the tests are successful with monkeys then human testing begins. These tiered rounds of testing are used to reduce the amount of mistakes and negative side effects in all breakthroughs. It is argued that animal testing saves many lives and there is no alternative to testing on a living organism. In addition there are strict regulations for animal testing which prevent any mistreatment of the animals in question.
After I had eaten the small portion which sufficed to fill my stomach halfway, Brother David casually mentioned his belief that it was an offense against God to leave food uneaten on the table. This was particularly the case when such a great restaurant had so clearly been placed in our path as a special grace. David was a slim man and a monk, so I found it hardly credible that he followed this precept generally. But he continued to eat so much that I felt good manners, if not actual spiritual guidance, required me to imitate his example. I filled my belly for the first time in a year.
Homo sapiens actually ARE primates. However, we are part of the Great Ape classification of primates, all of which consume meat to meet their nutritional requirements at least occasionally. In addition, eating meat, especially cooking meat is an element of what helped us evolve into larger-brained mammals, not just because of amino acids, which can be found in other foods, but because of the reduction of energy expense devoted to the gut and redirected to the brain, as cooked food is much easier to digest. So while there are a couple inaccuracies in your argument, I agree with your main point. Our bodies are engineered to process meat.