I mean, if there's any time where you want to be clear about the distinction it would be now, right? What people who really care about Rust need to know now is that it will prosper outside the control of its corporate backer.
Telling us the Mozilla still supports Rust (at a time where it's by definition true that it is reducing its support) is communication that should come from Mozilla, not rust-lang.org.
I didn't get that impression while reading this blog post. Is there something in particular that gave you this impression? (Mozilla doesn't really have any leadership role in Rust, as I understand it)