The authorities are stuck in an analog age with an educated population. The news cycle and and information move in rapid pace. The economic pressure, lack of opportunity, inflation, poverty, lack of expression on and on and instead giving people breathing room, they think tactics of 20 -30 years are still going to work. Iran had 2 revolutions in the 20th century, This is not something that started from outside the borders. Mahsa' death was a spark. People are fed up. When you have nothing to lose, when they kill your son, daughter, brother, mother, your neighbor , the day of reckoning will come. Even if they are able to squash this with brutality and wholesale murder of civilians, rape of daughters and mothers, it will never be same.
The outright disobedience for the authorities, burning and destroying anything that shows the authority of this regime tells you where things stand in Iran today.