Jay....my comment means when given two indications that generate an incongruity, or are ambiguous, or otherwise in conflict....especially when it comes to fuel quantity....go with the one that presents the worst situation.
As you very correctly tell folks re the correct action to be taken when the Red Lights illuminate....you are endorsing what I mean by the one dissenting vote rule.
Either system, quantify of low contents warning....might be wrong....heck...they both might be wrong....but go with the worst case scenario as you describe.
Elapsed Time might be ok, Fuel Quantity might be ok....but the Low Contents Warning illuminates....there is the one dissenting vote re continuing the flight.
Any one of the three that says continued flight is not right....is the dissenting vote.