I'm not sure what we're arguing about. You say "don't break bugfix releases." I say "don't break bugfix releases." Docs don't say "we don't break bugfix releases." Instead, docs say "we break all the time don't trust us" instead of "pin to a minor version if you don't want to break all the time."
It's specifically not a question of knowing how the Rust community usually does these things, it's a question of "does this package conform to Rust's semver conventions, the official semver conventions, or something custom?"
The statement, _as its written in the docs_ implies "we do something custom." Whether that's true or not is irrelevant. I read it, interpreted it as a lack of governance or adherence to standards, and moved on. Any professional engineer would do the same.