I think TC was talking about getting to Vy after leaving the deck as you will need to establish a safe single engine condition before you T handle the one that is on fire.
So your TRE is happy that you slavishly follow your super SOP and that you leave the deck and immediately get the engine fire warning, climb to 500' (engine still burning) carry out the drills (engine still burning) use both bottles (engine still burning) and then decide to get down (in the dark) from 500 feet to ditch (engine still burning).
Frankly I would rather take the bollocking and get the aircraft in the water before the fire takes out the controls/hyds/TR drive but what do I know, I'm not an offshore pilot?