It was until the bronze age European culture see, about 3000 years ago, see cows milk over take sheep and goats milk. Various native American cultures had nut milk as a common drink and Asian cultures soy milk dominates. Even in the West drinking cow's milk wasn't common until the temperance movements of 20th century.

Words evolve, and we should prefer more accurate and inclusive language when we can. If we have to have a law on it, it should be the most universersally accepted language not just one groups preference, because language is just a tool for communication.