I wonder what their rationale was? It seems like a grave mistake. On the other hand, an actively moderated (via Discourse algorithms) CAF should ultimately be better than a bunch of people automatically ignoring one another. While the ignore button is a Godsend on some online forums, enabling one to turn-off seeing personal attacks directed towards themselves, it doesn’t stop trolls (and groups of trolls) from purposely derailing threads, which can be a real issue.
I have watched more than once where a brand-newbie was absolutely torn to shreds and it was clear they had no idea what they had done (usually something trivial – if it was anything at all) and no idea of what really was going on.