Earlier quoted context omitted.
There are a group of amino acids that the body has to get externally. There are a few veggies that do have all those amino acids, but I guess soy and peas don't
> There are a few veggies that do have all those amino acids, but I guess soy and peas don't You guess incorrectly. Soy is a complete protein. https://pubmed.ncbi.nlm.nih.gov/19145965/
Complete in the case of containing relatively minute amounts of some of them. You would have to eat an amazing amount of soy per day to get enough.