>>16711250
>There's difference in charge between those two points, neglible but there is...
None that doesn't exist between any other grounding method.
Your sink is connected to your plumbing which is connected to a series of buried conductive tubes.
Metal chassis are usually connected to the ground pin on the power plug, which is either tied to your plumbing or to an independent wire that's driven into the dirt.
The screws on your light switch are tied to the light switch's housing which is tied to wherever your ground pin goes.

Any variance in electrical potential between these points would be replicated in the metal fill under your floor.
By the way, grounded floors are already a thing. They're commonplace wherever you find people working with sensitive electrical equipment.

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Is earthing good for you?>try it>feet literally tingle even though they are still>tingle stops after some time>go back…

Is earthing good for you?
>try it
>feet literally tingle even though they are still
>tingle stops after some time
>go back…