All of the communications on these channels are typically legally discoverable, so it makes sense you don't want to introduce potential vectors for political discrimination in an increasingly remote world.
There are plenty of non political topics to cover...Gardening, pets, clothing, home renovation, local music events and festivals, kids, etc. In all the teams I've been on, political topics never came up. It's okay to find friends outside of work and discuss politics with them; your social network doesn't have to center on the workplace.
I saw a thread of many women talking about similar issues in a pro-vaccine Seattle group (where younger people were looking to get extra vaccine doses before the vaccines were open to all ages). There are also threads in women's subreddits.
Also note that the costs of flying someone in right now is mitigated by the fact that all on-sites are virtual right now. And unemployed people in 2020/2021 may not have the luxury of being picky about a higher salary. You tried launching this in a weird year.
I wish, as someone who has been job searching, that I could use something like this...Have you reached out directly to employers or did you just post about it to hackernews?
At a glance, I'd be unclear on what set of scenarios they expect the site to help out with. The person would need to type the right search term and hopefully land on the right result. If they wanted to use the navigation, it seems hovering over the menu items doesn't show you the structure of the site-- you need to click into each individual tab. It's pretty but hard to gauge how useful it is.
There are plenty of non political topics to cover...Gardening, pets, clothing, home renovation, local music events and festivals, kids, etc. In all the teams I've been on, political topics never came up. It's okay to find friends outside of work and discuss politics with them; your social network doesn't have to center on the workplace.