لَيْسَ كُلُّ بَيْتٍ مُحْتَاجًا إِلَى الْقَدْرِ نَفْسِهِ.
Not every household needs the same quantity.
The expression denies uniformity across all households. It does not assert that no household needs water, nor that some households have no need at all. The denied proposition is specifically that everyone needs an identical amount.
WordingClaim
Not every house needs the same amountNeeds vary
No house needs waterAll need is denied
Equating these claims is a mistake about the scope of negation, not a difference in stylistic elegance.