Bus 429, 411A, Airbubba et al,
Let me get this right.
You have an engine fire, use the bottle, the light goes out and you do what.........?
By your arguments, stick the nose down and throw it on the nearest piece of tarmac!
I think not.
So if the warning went out in this case, it would appear reasonable for the crew to take a few moments to consider the situation/options. YOU don't know (neither do I) how long they held, IF AT ALL, neither do you have the met, notams etc.
When did you become judge and jury?