Most Canadian oat/almond/soy milk substitutes are filled with carrageenan, xantham gum and guar gum. The ones that aren't, like Earth's Own Naked Oat are double the price of the others, exceeding the price of milk.

I've discovered that I can buy local, unhomogenized milk in my city that comes in glass instead of plastic or PFAS lined cardboard. The price is $5/bottle but the taste is miles above the cartel milk or the substitutes, and oddly doesn't trigger my mild lactose intolerance either.