Interesting that you went for something obvious like an enging fire.
Suppose it was something else that caused the reject, smoke from unknown source, major electrical failure (lets not do the should you or should'nt you stop thing).
You may not initially go for the evacuation and then find you need to.
No confusion, no doubts....... just grab the QRH and read and do.
It takes a few seconds and you can make the call.
Also, on the Airbus, it's all the down to the FO to switch everything off and fire the extinguishers. The Captain is supposed to be gathiring info and assessing the situation so he's not directly monitoring the FO to ensure his memory is working under great stress. I know mine doesn't
