You don't use the oil pressure switch to save the engine bearings.

It's there so that the electric fuel pump will not continue to pump gasoline if the engine shuts off. Such as in an accident.

If you need something to monitor your oil pressure in order to save your bearings use a gauge or an IDIOT light in parallel.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.