[Editted to add: And I see the conversation moved on while I was typing that. Nice one.]
That’s the thing though, these things don’t happen by choice - no-one decides ‘off the bat’ that their place is going to be unfriendly to women, or any one of an infinite number of ethnicities, or genders, or disabilities. It just ends up baked-into the culture, slowly and transaction-by-transaction over time and what the science fiction cons, skeptical groups and many, many, others found was that the 'it can’t happen here’s let it happen by default, because it doesn’t happen here. (Does it? Nah, can’t be.)
And the people who got burned by this, or have something in common with the people who got burned by this - or just saw and empathised with the people who got burned by this, look for a clear statement of policy that unlike many other times, any complaints won’t just be ignored or given lip service. It’s not a ‘policy/statement somewhere on a page nobody will read’ - it’s a policy that gets used, if and when it needs to. And if it’s ignored, well, the flak will follow.
I’m not saying your growing corporate culture will try to be sexist/et al - quite the opposite but that page of policy, taken seriously helps reassure the burned, that unlike all the other examples, in other places, they’ll get treated fairly here.
And that’s a selling point. You want editors? You say you’re doing this anyway? Then it’s easy. Document it, promote the hell out of it and use it as a selling feature - “The 'pedia that treats it’s editors right” - that’s one hell of a pitch.
And the fact that lots of corporations get away with legal-minimum lip service to such policies doesn’t mean that that looks the same ‘from the outside’ as visibly making such policies and visibly taking them seriously. Joe user can tell. It makes news.
I mean, you’ve got the right good intentions - but that should make putting this in policy an obvious, easy, decision.