I have a feeling that a couple of posters in this thread miss the point about information. A fire indication doesn't mean "evacuate immediately" so everything starts with appropriate INFORMATION.
The stop in this case was called for an engine
failure.
During the decel there was then a fire warning (bell + EICAS message) on the same engine.
AFAIK the teaching has never been that in the event of a rejected take-off with an associated fire warning one should default to automatically throwing everybody down the slides, though I’d accept that there might be circumstances so dire (e.g. flames actually around the flight deck windows) that you might do that. Maybe trainers such as M. Mouse have an opinion on this issue, or have taught, or have seen it taught differently.