Yes, that must be it... they didn't think to break a window.
Many modern cars use laminated glass on their side windows now and, as far as I'm aware, this model has doors that won't open from the outside without power, making them very difficult to break open without tools even when the vehicle isn't on fire. 20 minutes in to the Tesla burning, when it was already sitting on top of a bomb of a battery... you're beyond fucked at that point. Difficult to just put the fire out for responders, a rescue was over about 15 minutes prior.
