I agree with that analysis Goosefoot.
I doubt deep down she believes it in every case because it is preposterous, but it's just such an American (and British ofc but there are more dissenters on the left here) leftist credo that she never questions it, and never gets past it. That's why you can't reason with these people. You can't convince them to change their mind with facts, because it's not a sincere belief that they could be persuaded by evidence to change, and they don't really care about any negative ramifications. What they are concerned about is being seen to maintain their position.
Occasionally you do get through to one of these people that all is not ok, and in my experience they often will blame you personally for that, if you put doubt in their mind or their sense of fairness or conscience bothers them. Because that way leads to being ostracised and possibly punished by your woke peers. And they are all scared of that, having seen what's happened to others.