I think you are being downvoted because your last paragraph is unnecessarily derogatory. Rather than having a preconceived mindset, I think she's being honest

I think you are being downvoted because your last paragraph is unnecessarily derogatory. Rather than having a preconceived mindset, I think she's being honest when concluding that it's an open question: "I cannot think of the Erdős Collaboration Graph without also thinking about who is represented and who is not, and why." The statistical point you raise is excellent, though, and deserves more discussion. Besides being male and female, are there other characteristics which distinguish the "notables" from the "non-notables"? Statistical analysis would normally require that the two groups be exchangeable other than being "male" and "female", and we know in advance that this is not the case. Is Wikipedia to blame if the otherwise valid criteria it chooses for notability (publications, citations) have a disparate impact on women? Probably not, but it's still a valid question of whether a different approach would produce a better societal effect, whatever that might be.