For that particular video she is.
Or perhaps it's because she knows it's a hot topic issue and so is actively preventing large amounts of arguments. Because, you know, she wouldn't be the first or the last Youtube user to do that.
It's her Youtube channel, and her right to block comments. That's why they give you that option, you know.
I have to say, assuming she's avoiding criticism is currently the
least likely scenario, and thus the least reasonable assumption. After all, if that's the only video she's got comments blocked on, she's left open many other options of criticizing her, even on her most recent video. It's not her fault if you don't want to use them.
Regardless, this doesn't change the fact that TAA's pretty much anti-feminist all the way through. And from what I understand about Anita, she's not one of the man-hating feminists, she's just dedicated to pointing out how the mainstream is subconsciously sexist. Which it is. She may not always get it right, but the amount of flak she gets for it is disproportionate to the extreme.