I'm not going to get into your statement about what "we the audience" want, because that is whole other discussion. But I can categorically refute what you said here. Lizzy, like so many others, went through the trouble of posting a black square months ago, in solidarity with the Black Lives Matter movement.
Those black squares that folks were so hasty to throw up to show their allyship are a bookmark of accountability now: they said it, so are they going to put their money where their mouth is or what? Or, once again, are they going to just settle back to their old ways? Lizzy talked about it in her vlog, she posted books and resources, so yes, we expect her to take responsibility. Regardless of our expectations of "just bloggers" as a whole, she claimed to give a tit. And while it may seem like a stretch to equate this to a review about white jeans, the point I'm trying to make is that if she's not looking outside of herself and her narrow social circle, what was any of that "listening and learning" for?