That is certainly not "all you need to do". It is good, and helpful, but if a person is prone to stones, it's often not enough on its own.
I know doctors tell us to chug water but it’s just tiring sometimes. In winter for example, I just don’t feel thirsty and I just get bored heating water, making time to drink it etc.
So yeah, drinking 2-4 litres of water can feel unnatural to me.
Thirst is weird. I find it manifests as an unaccountable malaise and lack of focus well before I begin to perceive the sensation I understand as thirstiness per se.
Yes I know what you mean, you don’t have to drink it all at once, but I still get bored having to drink. It’s just. Personal thing I guess. Kind of have to force water into my system.