The argument is that, when someone says "we're going to make this mentorship program more inclusive", people will have to wonder whether they mean normal inclusivity or Guido's sexist inclusivity. His actions alone won't radically shift the needle, but we'll eventually reach a point where inclusivity just means "there are a lot of women" and the original idea of fair opportunities for everyone is lost.

Note that this isn't a radical conspiracy - it's already happened in some areas. There are a lot of colleges with special inclusion resources for women, even though women are significantly overrepresented in the modern university system.