Niknak, I agree with all you've said and would like to emphasize that the crew accepted the directions to choose another runway. Should that happen to me, "Mayday, mayday, mayday..."
In many countries where English is not the mother tongue, nattering about low fuel and a possible emergency will likely be ignored.
I think the use of non-standard phraseology and generally chatting on the radio has (possible) dire consequences and the 'macho' pilot talk de-emphasizing an emergency does nobody any favours!