The fact she is a woman is different than the majority, however there are other women at LMG
I don't know how to respond to this without speaking condescendingly. I'm sorry, but you'll just have to trust me when I say that women can still be subjected to workplace harassment in situations where they aren't literally the only girl in the building. I'll leave it at that unless an actual woman wants to step in and expand on this subject further.
not all the men at LMG are sexist so most likely at least one person from one of those camps would object/want to do/say something
That's just how power works. If you're in the minority, your needs and concerns get less attention. If you're in a very small minority, they become practically invisible. Organizations aren't immune to this. Sexist outcomes can and will readily emerge from systems where none of the individuals directly intend to do a sexism.
As evidence, I'll point to the statistic itself. A gender gap as steep as this one doesn't happen by random chance. The only way you get this far skewed is with a feedback loop.