A vanilla soy latte is not a 3 bean soup! There is only one bean actually in the soup. Unless you are scraping the vanilla pod into it and sprinkling grounds on top, the other two “beans” are merely extracts.
It is a vegan bisque.
I agree with your premise, and here is some additional unsolicited information:
Vanilla ‘beans’ technically are fruit from hand-pollinated orchids! So scraping a seed pod or using extract makes no difference. It’s never been a bean.
Coffee ‘beans’ are seeds from the fruit of coffee trees and shrubs.