NO amount of peanut butter or soybeans equals the protien in any amount of complex animal D.N.A. Incomplete protien is nothing.
Vegetarian animals have more plumbing and another stomach called a rumen.
Vegetarians are dumb and slow compared with predators from dinosaurs to birds. NO nuts, grains, cereals, fruits, vegetables, beans or rice can be substituted for animal muscle. If you are what you eat and you do not eat RED MEAT it is impossible to make available all that is required for maximum growth and strength no matter what any expert says. Fat is bad, don't eat it. Removing bones and fat from beef is what a butcher does.