I’m not really sure how much of a failsafe the oil switch can be in this particular situation.
The electric pump is feeding a mechanical pump....... so even without oil pressure, and the electric pump turned off...... the motor still runs.
Just eliminate one more item that can cause problems...... the oil pressure switch.
Agreed and will mention: say the engine loses oil pressure while running, the switch shuts the pump off, the mechanical ( as already mentioned) will continue to pump and even if the mechanical was not there by the time the fuel bowls are drained the engine most likely will have suffered bearing damage at a minumum.
