The flight recorder revealed the passengers were calm until seconds before the crash, there was no time to evacuate even if they had parachutes.

It's harder than you might think. Usually people are afraid of heights and would hesitate or even panic before the jump, so the evacuation would take at least 10 min. What is more, you wouldn't be able to use front doors because they would be sucked by the engines, so everyone would have to jump out the rear.