I think that the way to approach it is that you are focused on creating the possibility space for marginalized voices to be heard and you are creating the opportunity for those stories to be told.
If instead of having quotas, you outright say that you give preference to marginalized people, you will absolutely be biased towards hearing their voices, I think that is a perfect center for your manifesto. At the end of the day, if you are creating a platform for marginalized communities, then sometimes you need to marginalize the norm - reverse the script and make the margins the center and push the focus onto the unseen, regardless of what the common voice shouts in complaints. Because they can scream that anywhere, they can express and declare themselves in tons of places.
But void.garden? Void.garden is for the people who can't express themselves wherever they want.