It just amuses me that they're effectively saying that anyone can fork this for any reason... except for the W3C.

No, they are saying anyone is allowed to fork this for any reason, but we’d really prefer the W3C didn't fork this for the reason that they are, because it's confusing and counterproductive.

Whether someone should be permitted to do something is a different issue than whether they should actually do it.

It is debatable if it is unethical given the license but it is definitely a disservice for the community.