Not all Teslas have mechanical latches on all doors. Specifically some Model Ys don't have them on the rear doors, apparently. (This is addressed in the article.) ¹
The mechanical latches have often been panned on the safety front because they're inobviously located and operated. Point 4 addresses this further, but look at the instructions for the rear door in the Model Y in particular.¹ This is complex and confusing without panic and adrenaline. (This too was addressed in the article.)
Not everybody knows about the mechanical latches. While one could argue that the driver should know their vehicle, what makes you think the passengers are going to know this, especially given the poor placement of the latches. Especially given just how convoluted the rear door releases are. (This was also addressed in the article.)
When people are in mortal danger, figuring out complicated things, or remembering obscure things like where the manual release latches are, is not going to happen. If the control to open the door isn't open, obvious, and in your face, you will not remember it unless you've been specifically trained to have this in your immediate-recall memory. That's why pilots of aircraft spend so much time drilling the same thing over and over again. Or people in militaries. Or people in emergency services like fire departments. (This was addressed in the article as well.)
Moreover, with the Model Y in particular, not all vehicles come with manual releases for the rear doors, as Tesla warns in the car's manual. It's unclear if the Model Y involved in the crash was equipped with the emergency feature.
Ok but they didn't open the front doors either. This is an argument of "the emergency latch is not clear enough", pretending there is no match is a losing argument
When you're dying if smoke inhalation the subtle difference between "hard to find" and "not existent" door latches doesn't matter - they're effectively the same.
What the fuck are they doing over at Tesla to make it hard to open a door in an emergency