For women with low levels of gender identification—who think their gender should be irrelevant at work and for whom connecting with other women is not important—being on the receiving end of gender bias forces the realization that others see them first and foremost as women. And because of negative stereotypes about women, like that they are less competent than men, individual women can be concerned that their career path may be stunted if they are primarily seen as just a woman and therefore not a good fit for leadership.
To get around these kinds of gendered barriers, these women try to set themselves apart from other women. They do this by pursuing an individual strategy of advancement that centers on distancing themselves from other women. One way they do this is through displaying Queen Bee behaviors such as describing themselves in more typically masculine terms and denigrating other women (“I’m not like other women. I’ve always prioritized my career”).
The point is, it’s not the case that women are inherently catty. Instead, Queen Bee behaviors are triggered in male dominated environments in which women are devalued.