There is also fire.
My seven-year-old can open a car door, but she definitely couldn't break a car window to escape, even if a glass breaker were there. Nor could many elderly people.
I don't understand this decision and as a parent do find it troubling. :-/
Yes, there is the 2-door coupe argument, but those vehicles are inherently less safe in certain situations precisely because they only have 2 doors for 4-5 passengers... I don't know why Tesla, which prides itself on safety, would negate the increased safety of the 4-door vehicle.
I agree with the comment that this appears to be a cost-cutting measure.