Why isn't drinking water more intrinsically enjoyable?

I'm literally dehydrated but I have to kind of force myself to drink water.

Is it because "in the wild" drinking water is often a big risk? Is it because fruit juice is just too delicious and kind of breaks our brains.

Anyway it does get easier. But, if I don't force myself to drink water I will get a headache from dehydration which seems like a bad design choice IMO.