The problem with even bothering to learn something like that is the social cancer will almost inevitably cause development to end in some cancerous social implosion or, even worse, mire it in some never ending legal turmoil.They're not wrong. Rust has a reputation over on /g/ and the like for having one of the shittiest communities of any new programming language. I've seen quite a few jokes about how the Rust compiler will refuse to compile your code if it violates their strict code of conduct. There's also the fact that Steve Klabnik (the book author) is super woke to the point where he thinks there needs to be a violent tech antifa, and was involved when Moldbug got banned from a tech conference.
Even if Rust is the most revolutionary new programming language ever created, the community and userbase overshadows it hard.