Is there any reason why soy milk is so popular compared to other bean milks? I mean, there really aren't any other bean milks sold in grocery stores unless you make it yourself. For example, why not use garbanzo bean milk or pinto bean milk? Is it simply a matter of tradition or is there a specific reasoning behind it?
Take almond milk for example. The reason why it's popular is simple: it's typically less expensive compared to other nuts, it tastes good, and it's versatile.
But if you look at the price of soy beans compared to other beans, they are about the same price per pound in the grocery store. And soy beans taste pretty much just like any other bean, so it doesn't get any bonus points there.
If there is a unique property of soy that makes it truly distinct from other beans, please share.