No, its fine. Part of the problem is that "criticism" isn't just one thing. There are many many vectors to approach critiquing a work from. Some depend heavily on context, some don't. Some care about trying to understand "intent", others don't. When you're looking at something like the prevalence of storytelling tropes a lack of context isn't particularly the problem: tropes can be contextualized well and they can be contextualized poorly. With sexist tropes in particular, and the way Anita is addressing them even more in particular, the problem is more one of perspective. Every work of art and media expresses a perspective in some form, and regardless of how various elements of that perspective are or aren't contextualized they still reflect the underlying perspective about the world.
You can have a well developed and internally coherent reason for why all of the female characters in your work are, say, weak and helpless, but that doesn't change the fact that the perspective that work articulates is one in which all the women are weak and helpless
That's not necessarily the creator's actual perspective, but it is the one that they are articulating