Agreed. Everyone understands what 'almond milk' means, nobody is misled by it and it's really not the critical issue dairy farmers are facing when it comes to the downfall of their industry.
They know their arguments are disingenuous. It's a ploy by the big agro-conglomerates to maintain their stranglehold over the dairy market. They've been artificially inflating and fixing the price of milk and stifling any competition for decades now. The dairy industry is a tax subsidized financial house of cards incapable of actually competing in a fair market. If demand for milk suddenly falls so does the house of cards.
Taking just the naming into account or listing other things with milk in their name is missing the point. Those are not sold as direct competition to dairy milk. Looking up how those nut milks are made, we might as well call it almond juice ou pecan juice. If almond milk is to be sold as an alternative to cow milk, and most importantly marketed as such, then butter can be sold as an alternative jelly for people with diabetes.
Nut milks certainly are intended to compete with animal milk. They serve a similar culinary and dietary purpose -- a role they serve well in a wide variety of situations.
Zero people are confused by it: they know what a substitute is.
I think the diabetics prefer to use sugar free and low sugar jellies as closer substitutes for full sugar jellies.