I think it's really important for people to understand this because many people think that plant foods are actually completely devoid of one or more amino acids. The theory that we need to eat those combinations at the same meal has largely lost favor though. The older methodranked all foods against the amino acid score of eggs and therefore, undervalued all plant proteins. I think it is fairly definite that vegans have higher protein needs than omnivores, although it is more due to digestibility than amino acid quality. The reason it's a moot point is that all vegans do this anyway.
Nobody eats just one source of protein.
So it's not that vegans don't need to worry about combining proteins because they eat so much protein. Rather I think it's that they don't need to worry about eating a lot of protein because they normally combine proteins. A long time ago, I took a nutritional science course and they explained food combining. I believe that the theory is correct. It'misunderstanding about it.