Either way, we are entering the Trough of Disillusionment with respect to Hydration with a capital H. Drinking liters of water a day is not the solution to all of your health woes.
It really depends on the diet. I eat mostly vegetables, rice sometimes, and almost never drink water (I just force myself with mouthwashes before sleeping, with some dilluted and clean seawater it's even better), never feel thristy because my diet is extremely low in sodium (maybe too much even) and ultra rich in fiber
Careful going too low sodium. And high fiber + dehydration can result in constipation. That said, it sounds like you may well be getting a good amount of water from the vegetables themselves, depending on what form you're eating them in.
raw only, for example today: peppers, tomatoes, dates!, grapes, mushrooms, leeks, onions. (leeks and onions, I try to let them ferment a bit). Sometimes a bit of rice (only thing cooked I eat)