Does it make a difference where the smoke originate from? The cabin is contaminated and staying inside may be life threatening..
Yes it does make a difference..because going outside through an exit may be even more life threatening....taking a worse case scenario do you want to open a door adjacent to a fire and let more smoke in, or perhaps evacuate onto a burning wing/down a rear slide into a fuel pool behind a burning engine?
In all honesty in the cabin you as an individual probably have little or even no idea as to the level, nature and location of an external threat. Performing a knee jerk “DIY” evacuation can actually raise the level of risk to everybody on board, as seems to have been demonstrated in this case.
There’s a heck of a lot more to a successful evacuation than simply throwing all the doors open..