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We know that "thought diversity" on a team, which can take many forms, has a short term drawback (team gelling doesn't go as fast) and long term advantages (more ideas, better ideas, better resilience, etc etc).
Read up.
If thought diversity is what matters, a much better determinant is probably geographical distribution in upbringing and unique educational paths and unique previous employments (all of which can just as easily be estimated by a resume as gender).
You could also argue that equity is a bad thing, but I wholeheartedly disagree with that. However, your argument is simply logically unsound.