Legal position for the airline.
If fire fighter recognized as " Tender one" calls " no evacuation".
His professional training and expert advise must be licensed to give this instruction, like ATC clearances,
They must be fully legalized and responsible under the law.
This gives full unqualified responsibility and exposure to the courts.
That is highly unlikely.
The captain is the only recognized authority.
To change that is a big change and requires legislation.