I actually favor a vegetarian diet. I have found it very difficult to be on a vegetarian diet and find the protein sources without too many carbs, including complex carbs.
There are some vegetable based protein powders now. Some also qualify for athletic training, as they have a complete profile of amino acids. I have yet to meet a veggie protein mix I can stomach.
I cannot do many complex carbs. My metabolism just does not do well . If I have a carb, it will be complex; however, I have to severely limit them.
I am very attracted to the expansive energies of vegetables, as opposed to the more contracted energies of other foods, like meat, for example.

Just a note of interest (possibly):

I 'd studied /ate a macrobiotic diet/lifestyle for a full year. Lots of brown rice, miso and seaweed. Lol! A big part of the macrobiotic teachings have to do with the "energetic" properties (expansive vs contracted, as well as balancing yin/yang.)within the diet, as well as in the body.

Expansive foods are thought to be more healthy. One way to increase the expansive energetic nature of a cooked food is to use gas as the fuel for cooking, which makes a food, brown rice for example, more expansive then the same rice cooked on an electric burner. Rice cooked with gas is often more fluffy and each piece of rice is more expanded. Rice cooked by electricity tends to be less fluffy, more condensed, more contracted than that cooked on gas.
It was an interesting experience. (The hub of the macrobiotic teachings are at the Kushi Institute in Massachusetts, USA)