You're joking, right? Dairy Milk requires not just way more water but also space, work and a deeply unethical business concept (cows have to constantly be impregnated to produce milk, the antibiotics they're given en' mass are destroying our most important drugs' effectiveness, the food we give the cows could feed multiple humans, ecetera).

Almond milk is also the most demanding of the alternatives as far as I know. Oat milk is even more efficient, and other than with cows we can still make farming them more efficient (drip-farming, Solarfarming - crops have higher yields and lower water needs in partial shadow as well - ecetera).

Not sure where you got your opinion from. There are good alternatives.