Are you saying that if I grab a white wire in a household circuit and
stick my feet in a bathtub of water , that I will be perfectly fine
because both the wire and my feet are at the same potential ???

That's the truth!

Of course with today's plastic pipes, you might even get away with grabbing
the BLACK (hot) wire.

IF a circuit is fully loaded (but not overloaded) then there might be 1 or 2
(or 3) volts difference between the WHITE and GREEN wires.





Maybe I misunderstood you ?