So is our body. If we just give it what it is designed for, when it need it, there will be no trouble. One of the biggest sources to diseases. To eat a lot of meat and other complex protein is not macho, neither smart, since all it does is destroys the kidneys, the liver, and a lot more nasty things. One of the best things is that you get a nice, peaceful consience for the rest of your life, based on the true concept that lest harm and killing is done to other fellow beings, for me to live a healthy happy life.
Time is saved from cooking, dishes, sleep, shopping.
Energy is saved, in the body, in your house and in the world. And a lot more things, but this is enough I think for a start. Well, then you are wrong. A virus can mutate from mold, to bacteria to virus and back again. This is not due to the virus, but to the point that you poison yourself all the time.