"rice milk or soya milk are simply products made from edible plants plus water"

You would never use 'Soy Milk' if you saw the sort of 'oil refinery process' used to make it commercially. The 'home made' stuff is somewhat different.

"And just how do they milk those little tiny soys?
Yeah, I know, really really tiny stools and buckets."

I'm sure there's a joke about tiny stools, but I ain't goin' there!