Nut milks are highly processed, artificial food. They lack most of the nutritional elements of the nuts used to make them.
I have recipes for them, and machines that can do it. Almond milk is very simple to make.
Depends on how you define "nutritious". The people who make almond milk claim all kinds of advantages over cow's milk. I tried it for over a year, to see if it would reduce my cholesterol. It didn't.
Then I read a study that said cow's milk wasn't so bad for you after all, even whole (here we go again, discussing these constant food advice revisions in another thread). So I went back to it. Just got my blood work last week, cholesterol is the same as with the almond milk, no change.
So guess I'll stick with cow's milk, that I prefer. I do think it's more nutritious overall.