Why do vegetarians often eat foods that contain soy and other legumes?

Not all vegetarians do this. Basically, many people forget about replacing meat with soy and various other foods, simply because of some pity for animals or simply because it is just fashionable to be a vegetarian. This is how many health problems arise. Everyone, especially vegetarians, needs to eat soy, various legumes, plant seeds, nuts and other plant products. These foods contain all the amino acids that the body gets from meat. Many plant foods contain even more nutrients that we need than meat.