The article you linked shows that she upholds left-wing, socialist, feminist principles much more scrupulously then so many who call themselves "the left". It's no wonder she doesn't want to identify with them as a political group, even though her ideological stance is still firmly leftist.
Here's an insightful article she wrote some years ago that dives further into this problem much of "the left" has, framed around their celebration of the prostitution of women: https://www.feministcurrent.com/2011/11/07/why-does-the-left....
She writes:
"While I have long been a supporter of labour rights, of unions, and have counted myself as a fighting member of the working class who has waivered somewhere between socialism and Marxism from the moment I understood the concept of class struggle, I've found myself suddenly misaligned with some of those with whom I share my end of the political spectrum."
"These are the people I vote for. They represent my interests and ideologies and yet, when it comes to the issue of prostitution, it feels as though we've been pitted against one another."
"On one hand there seems to be a distinct lack of class analysis – we forget that there are reasons that some women are prostituted while others are not, that some women have a 'choice' while others do not. On the other, because decriminalization has, in part, been framed as a labour issue (i.e. that this is a job like any other and, therefore, should be treated in the same way any other service sector job is, in terms of laws), the gender and race factors fall to the wayside and we forget that prostitution impacts women and, in particular, racialized women in an inordinate way."
And:
"The reason for a man to buy sex from a woman is, without a doubt, because he desires pleasure without having to give anything in return. This is a male-centered purchase. If we are to define sex as something pleasurable for both parties then how on earth can we define prostitution as sex work? There is something decidedly unprogressive about calling something 'sex' when the act is, in fact, solely about providing pleasure for one party (the male party) without any regard for the woman with whom you are engaging in this supposed 'sex' with. Doesn't this defy the whole enthusiastic consent model?"
"While I certainly support human rights and worker rights, I also support women's rights and believe that, as a feminist, I cannot and will not work towards normalizing the idea that women can and should be bought and sold. I certainly will not promote this as part of my progressive politics."
And much more - the whole article is very much worth reading. Do you not agree that she makes many thoughtful and well-considered points?
The fundamental problem is that within many leftist groups, there is a huge blind spot when it comes to women's issues. It should not be too much to ask that women be spared from male sexual violence, and women be permitted female-only safe spaces away from men.