My understanding is that the reality of the situation is that Saudi Arabia is extremely patriarchal by law. Women need men's permission to do anything. By reducing the friction for men to approve women's activities, you make men more likely to let women do stuff.

Now the man doesn't need to go to a government office to let his wife travel, he just taps some stuff in an app. Like I mentioned, there's an argument to be made (that I personally disagree with) that this increased friction will somehow accelerate change in saudi society or something. But the argument there is that by inconveniencing oppressors you'll somehow make them more empathetic to the oppressed. History says that doesn't usually happen. You just annoy the men and then don't help the women. Change comes slowly and incrementally, not all at once in an avalanche.