Indication of oil pressure loss with normal oil pressure/temp is most likely a gauge/transmitter failure. If oil pressure/temp are not normal it indicates loss of oil quantity.
Are you saying with loss of oil pressure and high temperature you'd continue running the engine? And that you'd run the engine until it was "completely cooked" before shutting it down?
Oil starved bearings are very unlikely to lead to a severe engine damage at idle.
Oil pressure needs oil quantity, a properly sealed system and a working pump. Oil temperature needs a proper balance between internal friction and the oil cooling. I agree that too little oil is likely to affect the temperature It is readily corrected by reducing the RPM (friction) to idle. All are appropriate thoughts for a single flight. However be aware that continued faults over multiple flights may be an indicator of the oil seals allowing hot air into a bearing compartment and should be treated as likely to lead to an internal oil fire which can be very serious.