Sure is, milk is drunk all over the world in large quantities. I can speak for Portugal, the milk aisles in the supermarkets are an order of magnitude larger than the soy, almond, etc "milks".

Without milk you won't have butter, mascarpone, cream, cheese and yogurt (and many spreads).

Milk is also the basis of most breakfasts around here, with granola and other cereals. We also give milk to children in school to help those that are poor and may not be eating properly at home.

On a lighter note, milk is essential for the confection of many cakes, for chocolate, ice cream, as well as for many recipes, sweet and sour.