~~It's a secret third option, I suspect. You stated that everyone is equal so (by my interpretation) they meant to show you the difference between theory and practice. As in "if you've ever worked in the service industry you'd have experienced first-hand that often you are not treated as an equal".~~
Everybody is equal, but many assholes don't see it that way.
Edit: nevermind. Just got to the other comments further down and am shown, again, the folly of giving the benefit of the doubt.
This indeed makes no sense. Exactly as much sense as the implication that white people posting less solves racism somehow. The article explains that that rule should be "if you're white, post less on topics about race and if you do want to post, think about what you're about to say".
In conclusion: shitposting remains a free for all.