The poster was suggesting a hypothetical situation where that is a policy. Very few places in the US have 50/50 gender quotas, and I doubt any have quotas which include non-binary people. I believe they were mocking the idea.
I was not mocking the idea, but giving an example where a reasonable quota led to bad outcomes. While I’m against outcome quotas, I’m firmly against discrimination (including mocking) of people based on who they are.