I don't disagree with you that it's probably a really good thing to eat whole plant foods...but when you bring up something like miso, or vinegar...what are these but a further processing of whole plant foods? And why are these OK, but something like a pea extract or a pea-based protein not healthy (and I have no idea if they are or aren't).
Those are condiments, used in minimal amounts to give more flavor to the food. They do not make the bulk of the calories, maybe 1 to 5% of a meal.
This is unlike a pea protein isolate burger, which makes a huge part of the meal. Also, there is the level of processing, pea protein isolate is much more processed than fermented condiments like vinegar or mison.
You could even make miso from peas...