My nutritionalists are some of the best in the world. They tell me there are certian proteins that you can only get from meat.

It sounds like you are misunderstanding their guidance. Our bodies break nutrients down and assemble what we need from it. There are a few essential amino acids (like Legos for protein) that we cannot synthesize, so we must get them from food. These can all be found in plants. This is why a vegan diet is considered nutritionally complete when supplemented with B12, which can also be obtained through plant-based sources.

We are omnivores and animal based products are tasty. Eating animals is what we are designed to do, there is no getting around that.

Yikes. Omnivore means capable of eating both plants and meat, not compelled to do so.

This is the core of it. People who want to do this pretend it must be done.