Any group who decides to fork Rust probably isn't in a position of power to turn the whole Rust Project and Rust Foundation into something less messy. Without knowing any of the specifics about this "crablang" fork, creating a well-resourced, thoughtfully governed fork is often a pretty good solution to stewardship issues, and sometimes, new governance structures and procedures can even be ported back into the original project (see node.js vs io.js). Writing it off as "an enormous waste of time" where the people involved should have "engaged in a constructive manner instead" seems disingenuous.
Not that this is a core part of the post, and this doesn't detract from the overall message.