If I replaced my water intake with milk it would probably make me sick.

Water has zero calories, is reasonably filling, neutral-tasting, and gives me what my body needs, without any other junk. What's not to like?

Well, it's true that water has zero calories and is neutral tasting. It's not filling to any degree, and milk will give you a lot more of what your body needs.

Milk is water sugar and fat. Hardly a good source of things your body needs (except the water, which you can get from water)

- Along with extra enzymes that promote growing things kids need more than adults, and if all you drink is milk you will overdo it.

You're making me really curious what you think the purpose of eating is.

Also, what you think cheese consists of.

Cheese consists of milk mostly?

One can enjoy something without it being good for you. I like cheese. I'm under no illusion that it is healthy

Water is great for hydration without filling you otherwise. Like, say you need to drink a lot of fluid because you are really active, you would probably get sick of milk pretty quickly.

> say you need to drink a lot of fluid because you are really active

If you're replacing sweat, wouldn't you want sports drinks?

https://www.gocomics.com/peanuts/1969/03/27

But anyway, in most cases, the fact that drinking milk doubles as a source of food is clearly a benefit. It's hard to explain a common behavior by reference to a rare circumstance.

Sports drinks aren’t really good for you, but you definitely can drink a lot more of them than you can milk.

The idea of sports drinks is that you can drink them without getting water poisoning. This is only a concern if you need a lot of water because you've been sweating a lot, but I thought that was the scenario you were pointing to.