Why do humans need to drink water?

No.11927144 ViewReplyOriginalReport
Pic as example, many foods are mostly water
If I got 4 liters daily just with fruits, daily and vegetables but didnt drink "pure" water, would I get kidney stones for example? Are there any studies on this?

>inb4 /fit/
Theyre the broscience board, this board is supposed to be the actual science board, I can ask there too but I prefer asking here first