I drink milk, but milk isn’t superior to oat milk.

mammal milk has specific ingredients that are meant to specifically feed infants of that animal. So its often high in fat and has specific things that are meant to be digested by that animal. Breast milk from a human has special ingredients that help digest the high lactose content and those ingredients are not in other milks.

Now Oats have been designed over years to be digested by humans and other animals. They propagate by being consumed and then travel to other areas post consumption. The nutrition in oats and other vegetables is mostly there specifically to drive animals like us to eat them so that we propagate them.

As long as that infant happens to be a cow

I’m not trying to be objectively correct at all.

Literally you: “Of course proper milk is superior to oat milk.”

(Side note: that fermented hay is called Silage and fun fact it’s one of the single foulest smelling substances produced by humanity. Smells more like raw sewage than actual raw sewage, and frequently triggers asthma attacks. Cows, inexplicably, go absolutely ape for it. A silage farm near where I grew up had frequent breakins from nearby pastured cows who had figured out the latches so they could sneak in.)