Having more diverse editors will lead to more diverse content.
Wikipedia pages of female scientists tend to get a lot more scrutiny than ones about male scientists [1].
There's another anecdote about moderator bias and some decent discussion on the issue overall in this thread [2].
Ultimately there are some issues Wikipedia can't solve since they are just a reflection of the rest of society in many ways.
"We can't write about this scientist and her work because no one else has written about her," is a problem that Wikipedia can't solve by themselves.
[1] https://www.chemistryworld.com/news/female-scientists-pages-...
[2] https://old.reddit.com/r/TwoXChromosomes/comments/ekv3te/fem...