Of course you can augment a language with libraries. But you are one developer and everyone else will make different choices.
Sure, you are free to make this sort of claims. But they are besides the point, aren't they?
The cliche being discussed here is C's hypothetical ties with memory safety issues, and here we are commenting on a discussion on how someone writes C using a framework focused on memory safety and thus providing "some guarantees" about their whole ecosystem. Yet, we're still seeing comments mindlessly parotting myths in spite of the facts that are being dangled right in front of their nose.