Comment by b65e8bee43c2ed0

1. "protein" is a blanket term for a number of amino acids we need, and vegetable sources tend to miss a bunch of them.

2. atrocious calorie to protein ratio due to carbs. I imagine eating a pound (dry weight!) of any legume every day would get real old real fast.

3. phytoestrogens. not just soy, all legumes are full of them, even peanuts.