Almond milk requires a lot of water to produce but it still take significantly less water to produce than cow milk. Even if you take into account the potential for meat (which is ridiculous because milling cows aren't typical steaks), the amount water used to sustain a cow (through drinking and watering plants) is huge.
If your options are cow vs almond and you want to choose the lesser of evils and only care about the negatives of the almond (water) it's still less evil than cow milk.